A complete guide to visiting the Royal Observatory

If your idea of fun includes stargazing, hop-scotching between hemispheres, and ogling historic navigational timepieces, well, you’ve come to the right place. We’ve got more Royal Observatory tips than you can point a very large telescope at, from the best photo ops to mind-bending must-see gadgetry of yore.

Published: May 12, 2025
Flamsteed House at the Royal Observatory Greenwich

Stop the clocks! Do I really want to visit this place?

Yes, absolutely! But especially if you’re into the following:

  • Quirky clocks
  • Great big massive telescopes
  • Cute constellation socks from the gift shop
  • Life, the universe and everything

Sounds right up my solar system, but how do I get there?

Space shuttle lifting off
A space rocket: not required for getting to the Royal Observatory

You can leave your TARDIS at home: Greenwich is perfectly straightforward to get to by all manner of public transport.

Trains 

The nearest station is Greenwich, a pleasant 15-minute stroll from the Royal Observatory when it isn’t raining, and a soggy 10-minute dash when it is. You can also roll in on the Docklands Light Railway (DLR), a driverless service that calls at both Greenwich and Cutty Sark stations. Nab seats right at the front of the first carriage for the win.

Bus 

Routes 129, 177, 180, 188, 286, and 386 all stop near Greenwich Park. Enter the park and follow the signs uphill to the Observatory.

Riverboat 

Surely the most stylish (and scenic) way to arrive at the Royal Observatory. Hop on a Thames Clipper from any one of 24 stops between Putney and Barking Riverside, snapping Royal Observatory and Cutty Sark selfies to your heart’s content as you cruise into Greenwich Pier.

Great! How do I get in?

Easy: get your mitts on The London Pass® to bag cosmic discounts on admission to dozens of top London attractions, including the Royal Observatory and several other Greenwich bucket-listers.

What is there to see now I’m here?

What isn’t there to see, more like. A veritable trove of space-time treasures awaits, and we’re here to help break them down for you, with our room-by-room romp through the Royal Observatory, Greenwich.

Flamsteed House

Flamsteed House
Flamsteed House and the Greenwich Time Ball

Named after the observatory’s first Astronomer Royal – a role that still exists to this day, fact fans – Flamsteed House is the OG of the Royal Observatory complex. It was designed by Christopher Wren (who else?) who, as luck would have it, happened to be a professor of astronomy as well as the 17th Century’s top architect-for-rent. And tis a terribly fancy confection indeed, all proud turrets, molded architraves, cupola-topped pavilions, and classic red-brick charm. Snap a selfie out front, then step inside for a whole universe of timey-wimey spacey-wacey marvels…

The Octagon Room

Child looking through a telescope

Consider life, the universe, and your own grinning visage as you capture yet another selfie in this extraordinary stargazers’ sanctum. There are many sides to the Octagon Room – well, eight to be exact. It’s here, in the oldest part of the observatory, where centuries of sky-fanciers (including inaugural Astronomer Royal John Flamsteed) have gazed heavenwards through Earth’s most advanced telescopes, pondering infinity. It’s a lovely, light-filled space, with 13-foot-high windows, the better to peer at the night sky. You can almost picture the 17th-century scene as musty, breeches-clad gentlemen carefully calculated planetary positions by candlelight. Or, indeed, stepped outside to get a better view. True story: Flamsteed made many of his observations from a man-cave in the garden.

There are also plenty of antique clocks to ogle here: precision instruments that allowed the astronomers and scientists to make ultra-accurate observations, as well as knowing when it was time for cocoa. And if timepieces are your bag, you’re going to absolutely love…

The Time and Longitude Gallery

Shepherd Gate Clock at the Royal Observatory Greenwich
The Shepherd Gate Clock at the entrance to the Royal Observatory

Did you know that, up until the early 18th-century, sailors navigated the globe largely by the position of the sun and, well, gut instinct. Extraordinary, right? No wonder shipwrecks were a near-daily occurrence back then.

The issue was this (here comes the science bit): while latitude is measured from a fixed point (the equator), longitude moves with the rotation of the Earth and can only be calculated by comparing the time on the ship to the time at a port, where longitude is known. Still paying attention? Good: it’s the bit about keeping time on a ship that caused what came to be known as ‘the Longitude Problem’, as there was no gadget reliable enough to keep time accurately across long voyages. Step forward plucky young clockmaker John Harrison, who achieved the unimaginable: a timepiece that required no lubrication (unlike those famously boozy sailors of yore) and was therefore immune to sea air and extreme fluctuations of temperature.

Anyway, the Time and Longitude Gallery is where you can goggle at the eye-popping fruits of Harrison’s labours, plus several other early navigational objects, including marine chronometers, sundials and more.

Must-see: Don’t miss your chance to clock (sorry) the indisputable jewels in this gallery’s crown. Harrison’s pioneering and quirky timekeepers – named, with rather less inventive flair, H1, H2, H3 and H4 – were instrumental (again, sorry) in bringing centuries of navigation disasters to an end.

The Great Equatorial Telescope

Constellations

This thing’s so massive that the observatory required a new dome to accommodate it when it was installed back in 1893 – that’d be the distinctive ‘onion dome’, named for its striking resemblance to the versatile bulbous allium, and concealing contents no less eye-watering. At 28 feet long, the telescope within is about the same height as your house, or a giraffe-and-a-half. Heck, even the lens is more than two feet across. All the better for peeping at planets, comets and binary stars, which remained the Great Equatorial Telescope’s primary purpose for more than 75 years, until its retirement from active service in 1970.

Pop inside to find out how the telescope works – and it does still work:  the observatory even hosts public astronomy sessions beneath the onion dome during winter.

Tick tock, it’s one o’clock!

Greenwich Time Ball at the Royal Observatory
The Greenwich Time Ball at the Royal Observatory

Now then: you only get one chance a day to catch the observatory’s iconic Time Ball in action, so make it count. Pop out into the courtyard in front of Flamsteed House just before 12.55PM to see the big red tomato on the roof rise halfway up its mast, before continuing to the top at 12.58 and dropping back down the pole at precisely 1PM. And yes, you really can set your watch by it, as mariners, clockmakers and the good people of Greenwich have done for nearly 200 years. Whatever you do, just don’t be that person who needs to pop to the loo at precisely the wrong moment!

And now you’re back outside…

Feet standing either side of the Prime Meridian in Greenwich
Don't forget your fanciest footwear for those Prime Meridian photo ops

There’s bags more to see and do around the Royal Observatory grounds, like:
 

  1. The Prime Meridian. Here’s your chance to place one foot either side of the Prime Meridian, thus straddling east and west hemispheres like a modern-day colossus. You’ll find the Meridian line in the courtyard, clearly indicated by a stainless steel strip on the ground and a perfectly straight line of happy, selfie-taking tourists.
  2. The camera obscura. Just a short shuffle from the Meridian line, this low-tech treat (or, at least, one of its ancestors) was used by 17th-century observatory boffins to gaze at solar eclipses without otherwise blinding themselves. Nowadays, this pinhole device mostly projects picture-perfect panoramas of the National Maritime Museum, Royal Naval College and River Thames. You’ll find it inside the small courtyard summerhouse.
  3. The Peter Harrison Planetarium. Named after the famous British philanthropist (no relation of Longitude Problem-solving legend John), this high-tech planetarium projects digital shows onto its domed ceiling and also hosts immersive science experiments and other events. You’ll need additional tickets to get in though – the planetarium isn’t included with standard Royal Observatory admission. 

Any chance of a guided tour?

 

Well of course there is! You can pick up a free audio guide to get all the juicy info we simply don’t have room to include here. Better yet, you can listen in 10 different languages, meaning you can have a new and increasingly bamboozling experience every time you go round! 

If you have time, we’d also recommend joining one of the regular guided tours. A lively expert-led whizz around some of the observatory’s most important objects, the Treasures Tour runs daily at 11AM and 3PM, but you’ll have to part with some of your own treasure for the privilege. Alternatively, volunteer talks cover much of the same ground and are included with general admission.

Keep an eye glued to your telescope (or, y’know, the Royal Observatory website) for details of astronomer-led stargazing evenings, fun family workshops and other special events.

Can I get a snack and a space-themed souvenir?

Child with cardboard robot and space decor

We like your style. The aptly-named Astronomy Café & Terrace will have you loosening your Orion’s belt the better to accommodate all those delicious sandwiches, cakes and pastries. There’s a cute kids’ lunchbox available for your mini stargazers, too. It’s always time for tea here, and the sunny terrace – with those coveted panoramic Thames views – is out of this world.

Mosey over to the shop, where you can pick up H4-inspired pocket watches, actual telescopes, cute space-themed socks, and various other galactic gadgets and goodies at prices that aren’t always astronomical.

Is there anything else to do near the Royal Observatory?

Kids aboard the Cutty Sark in Greenwich
Cutty Sark

Are you kidding? There’s a whole galaxy of starry attractions (plus several fine lunch options) to explore without even leaving Greenwich. Here are our top picks…

Nearby attractions you can visit with your pass 
 

  • Cutty Sark. All aboard for an adventure on the high seas! Surely one of the most famous boats in history, this 1869 tea clipper has found its permanent home on the banks of the Thames in Greenwich. 
  • The Painted Hall. Baroque’n’roll your way over to the UK’s Sistine Chapel to ogle 3,700 square metres of 18th-century art, including portraits of kings, queens and mythological beasts.
  • Queen’s House. Fine art and a quite extraordinary spiral staircase are highlights of this regal manor, just next door to the Royal Observatory.
  • National Maritime Museum. Ship ahoy! This one goes out to all the battleship buffs and sloop savants. Expect ship models, naval uniforms and epic tales of the explorers who charted our oceans.

Fancy a bite to eat? There are some solid waterfront options with lovely river views. Try the River Gardens Café or Victorian Trafalgar Tavern. The Gipsy Moth is a traditional Greenwich pub with a large garden, or hit up the Greenwich Tavern for pleasant views of the park. Greenwich Market is where it’s at for sizzling street food – grab your picnic and pick an elevated spot on the park’s lush lawns, the better to soak up all those sweeping Royal Observatory and river views.

Enjoyed this? Dig even deeper into the Royal Observatory with our bluffer’s guide to all things space and time and have a giggle at the funniest questions asked by Westminster Abbey tourists as told by the people who work there!

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Stuart Bak
Stuart Bak
Freelance travel writer

Stu caught the travel bug at an early age, thanks to childhood road trips to the south of France squeezed into the back of a Ford Cortina with two brothers and a Sony Walkman. Now a freelance writer living on the Norfolk coast, Stu has produced content for travel giants including Frommer’s, British Airways, Expedia, Mr & Mrs Smith, and now Go City. His most memorable travel experiences include drinking kava with the locals in Fiji and pranging a taxi driver’s car in the Honduran capital.

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British Museum, London
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The British Museum Vs National Gallery | The London Pass®

by Mia Russell London's Cultural Showdown: British Museum vs. National Gallery Are you ready to immerse yourself in the rich culture and history of one of the world's greatest cities? Then look no further than London's world-class museums and galleries! From the British Museum's ancient artifacts to the National Gallery's iconic masterpieces, there's something for everyone in this cultural wonderland. Plus, general admission to both is free! Two of the most famous museums in London are the British Museum and the National Gallery. Both world-renowned institutions have loads on offer, so let's take a closer look at what you can expect from each. The British Museum The British Museum is home to more than 8 million objects from around the world and is one of the largest and most comprehensive museums on the planet. This massive institution is particularly well-known for its collection of ancient artifacts, ranging from Egyptian mummies to ancient Greek statues to Mesopotamian pottery. One of the most famous items in the collection is the Rosetta Stone, which helped scholars decipher Egyptian hieroglyphs. But that's just the beginning - there is so much to see here that you could easily spend an entire day (or more!) exploring the exhibits. One of the things that sets the British Museum apart from other museums is the sheer scope of its collection. With objects from every corner of the globe, it is a true celebration of human culture and history. Whether you're interested in ancient Rome or modern-day Japan, there's something here for everyone. Another unique aspect of the British Museum is the way it is organized. Instead of being arranged by region or time, the exhibits are arranged thematically. This means you can explore topics like religion, money, or technology and see how they have been represented in different cultures and periods. It is a fascinating way to think about how human society has evolved. You can wander the galleries at your own pace or enjoy a guided tour led by experts who can provide context and insights into the objects on display. The museum offers free maps to help you navigate and plenty of benches and rest areas if you need a break. The British Museum also has a dedicated children's area if you are visiting with kids. Here, kids can learn about history and culture in a fun, interactive way. Games, puzzles, and activities are designed to engage curious minds and inspire a love of learning. And let us not forget about the amenities! The British Museum has plenty of places to eat and drink, including cafes and restaurants. There is also a gift shop to pick up souvenirs and books about the exhibits. And if you need a break from the crowds, there are plenty of quiet spots where you can relax and take in the beauty of the building itself. The British Museum is a great institution that is well worth a visit. It's a celebration of human culture and history and a testament to the incredible diversity of our planet. The National Gallery If you're a fan of art and culture, visiting the National Gallery in London should be on your bucket list. This world-renowned museum is home to some of the most iconic famous works of art in history, and it's a true feast for the senses. The National Gallery's collection spans more than 700 years, from the Middle Ages to the present day. The focus here is on Western European art, so you will find works by some of the world’s most famous artists, like Van Gogh, Monet, and Leonardo da Vinci. The National Gallery is home to the most extensive collection of paintings by Van Gogh outside of Amsterdam, so if you're a fan of his work, you will not want to miss it. The National Gallery’s collection is also organized by style and theme. This allows you to explore different movements and techniques more effectively. For example, you could explore the Baroque period and see how artists like Caravaggio and Rubens used light and shadow to create dramatic effects. One of the most famous paintings in the National Gallery's collection is undoubtedly ‘The Arnolfini Portrait’ by Jan van Eyck. This stunning piece from the 15th century is a masterpiece of realism, with every detail of the room and the figures depicted in the painting meticulously rendered. But that is just one example - there are countless other masterpieces to discover here. The National Gallery offers free guided tours daily, so that's a great option if you're seeking expert guidance. Alternatively, you can meander around the galleries and take in whatever catches your eye. The National Gallery is in Trafalgar Square, one of London’s many famous landmarks. This means there's always plenty of buzz and activity in the area, making it a suitable place to people-watch and soak up the atmosphere. The National Gallery has several cafes and restaurants where you can grab a bite to eat and a gift shop where you can pick up souvenirs and books about the exhibits. There's also a free Wi-Fi network to stay connected while exploring. The National Gallery is a must-visit destination for anyone interested in art and culture. It's a true treasure trove of masterpieces and a testament to the enduring power of human creativity. British Museum vs. National Gallery Ultimately, deciding which museum to visit (or whether to visit both!) will depend on your interests. If you're more interested in history and artifacts, the British Museum is the obvious choice. But if you are more of an art buff, you'll want to spend some time at the National Gallery. You will undoubtedly have a fantastic time regardless of which museum(s) you choose to visit. The British Museum and the National Gallery are world-class institutions offering a unique glimpse into the past and present. Can't decide? That's no problem either, they're in walking distance from one another (or an easy tube ride if you prefer) and both totally free to enter so pick both and enjoy a culture filled day in London - spiffing!

Go City Expert
Who's Buried in St Paul's Cathedral
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Who's Buried in St Paul's Cathedral

St Paul's Cathedral is one of the most iconic landmarks in London. It's also one of the most visited, with countless people wandering its halls throughout the year. But St. Paul's also doubles as a crypt, where some of the bravest and brightest minds are laid to rest. But who's buried in St Paul's Cathedral? Find out below! Including: Aethelred the Unready Sir Christopher Wren Horatio Nelson Joseph Turner and more! Aethelred the Unready We'll start at the beginning because chronological order rules. So, hop in your time machine as we take a journey back to 1016 and attend the funeral of the late King Aethelred the Unready. As you can guess by his title, he wasn't the most beloved king. So, was it preparedness? Was he too young to take the throne? Well, no. See, Aethelred's title is actually a mistranslation. The original name more closely translates to "ill-advised". Historical documents from his reign detail questionable decisions that bordered on comedic. When Vikings came knocking at his door with blooded axes, Aethelred the Unready chose to try and pay them off rather than meet them with steel. But, when all your opponent really wants is a payday, giving them what they want is hardly a deterrent. In fact, they just want more - like a modern email scam. As such, many more Viking clans came a-knocking, quickly drying up the country's coffers. Regardless of his choices - and unwise advisors - Aethelred the Unready lies buried at St. Paul's Cathedral. And, while he might not top any lists of the who's who of those buried in St. Paul's Cathedral, he tops ours. Again, because of chronology. Image courtesy of Natata/Shutterstock Sir Christopher Wren You may have never heard of ol' Aethelred, but you've almost certainly heard of Sir Christopher Wren. An architectural tour de force, Wren is responsible for many of London's most iconic landmarks. The Royal Observatory in Greenwich, Kensington Palace, and yes, even St. Paul's Cathedral are just some of the many structures he designed in the wake of the Great Fire of London, which destroyed much of old London on a hot summer's day in 1666. So yes, the big man even designed the very building where he was laid to rest. But did you know that nearly wasn't the case? In fact, after his death, there were no plans to entomb him in St Paul's. However, thanks to a public outcry, plans changed. And, rather amusingly, Wren even joked that, when designing the building, he had the perfect place to put his tomb. And, when you go to see his final resting place, you'll find it in the exact same place he first pointed out. Now that's a story! Horatio Nelson Next, we take to the seas and toast this legend of an admiral without comparison. Horatio Nelson was a hero of the Napoleonic Wars, ensuring decisive victories against the French. Having fought in constant wars from his younger years through to his Admiralcy, Nelson's luck ran out during the famous Battle of Trafalgar, when a musket round pierced his shoulder, lung, and spine. While it may be a struggle to survive such wounds in the modern day, back in the 19th Century, it was a death sentence. But a man of such renown could not be buried at sea. There was only ever one place Nelson would be buried; St. Paul's Cathedral. But the journey from Trafalgar to London is long, and there weren't exactly freezers back then. So what did his crew do? They buried his body in a casket full of brandy, which just so happened to be Nelson's tipple of choice. The brandy helped preserve the admiral's body as it was safely transported to St Paul's. A boozy return for a deserving fellow. Joseph Turner Yep, St. Paul's Cathedral doesn't just welcome war heroes, kings, and giants of the architectural world. It welcomes painters too. Ladies and gentlemen, Joseph Turner. Turner was known for his breathtaking paintings capturing the essence of nature's beauty. Famous for this oceanic artwork, you'll likely recognise many of his paintings like The Shipwreck, Fisherman at Sea, and The Fighting Temeraire. Turner's work is almost immediately identifiable - no one paints quite like that. But legends suggest this isn't due solely to his skill. Supposedly, he made his own paints using unique elements such as herbs and spices, giving his paintings their unique look. Duke of Wellington Just when you thought we'd turned a corner, boom, another war hero appears! And yes, it's yet another military leader whose biggest triumphs occurred during the Napoleonic Wars. However, the difference between Horatio Nelson and the Duke of Wellington, aka Arthur Wellesley, is that while Nelson's victories took place on sea, the Duke of Wellington's victories happened on land. But, while his military prowess has been celebrated for centuries, the ol' Duke has a sense of humour too. At dinner one night, long before his death in 1852, Wellesley said that he didn't care where he was buried as long as they buried him in his boots. Maybe you had to be there? Either way, his wish came true, and he now rests beneath St. Paul's Cathedral, buried in his boots. Alexander Fleming And finally, last but certainly not least on our list is perhaps the most deserving. He may not be a king, an artist, or a "war hero" - though he did serve in a war - but his work has arguably saved more lives than anyone else. Not just on this list, but on the planet. You may not know his name, but you know his work. Ever taken an antibiotic? Well, you might not have if it wasn't for Alexander Fleming. The brilliant Scottish microbiologist was the first to discover that bacteria avoided certain fungi. Following testing, he realised why; said certain fungi kill them. This discovery snowballed into penicillin, the first antibiotic. And, to put it mildly, penicillin changed the world. No longer were infections a roll of the dice. Now, people would survive. If anyone deserves their resting place beneath the hallowed halls of St. Paul's Cathedral, it's Alexander Fleming. So, if you were wondering who's buried in St Paul's Cathedral, wonder no more. Of course, this is just a handful of the many luminaries who now call it "home", so go visit and see them all for yourself! Westminster Abbey is another popular burial place for famous faces of history so you could have your fill of historic graves in Westminster Abbey or St Pauls' Cathedral but with the London Pass, you can visit both and even skip the queue at St Paul's, as well as all of London's biggest attractions, for one low price!

Dom Bewley

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