Immersive Treasure Hunt Adventure - The City - The Secret City London

star star star star star 33 reviews

Duration - 2 hours 30 minutes

CNY 269 p.p. onwards

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Greater London, United Kingdom

Immerse yourself in historic sights and obscure quirks as you solve riddles and progress on your treasure hunt style adventure. Once your tale starts you’ll unravel cryptic clues to unlock the hidden path to a location within walking distance. Decode the clue and search nearby to find the answer. All on your mobile phone.

--"Had a great time on the City of London walk. Visited a few places we didn't know existed and had a very nice lunch at one of the recommended pubs - so nice we took a bit too long and our time wasn't that good! Will definitely try another walk."
--"We had a great time, seeing some interesting hidden gems and generally 'observing' more than you normally do! Never knew there was a Roman Amphitheatre in London!"
--"Really fun day out discovering hidden gems of the city of London. Great clues, lots of fun trying to figure them out. 100% would recommend for anyone who wants to see the lesser known side of London."

Available options

Team of 4 - Whatsapp
Communication method

CNY 538
p.p. onwards

Team of 2 - Whatsapp
Whatsapp (Recommended): Sent via Whatsapp smartphone app. Add up to 5 team members to receive & answer clues!

CNY 269
p.p. onwards

Team of 5 - Whatsapp
Communication method: Receive messages via Whatsapp

CNY 672
p.p. onwards

Team of 3 - Whatsapp
Whatsapp: Messages sent to you via Whatsapp

CNY 403
p.p. onwards


A trail through the Square Mile, the original settlement of London formed by the Romans. Gather your team and get exploring; start near St Paul's Cathedral and work your way East.

Discover a Roman Amphitheatre before reaching halfway where you can soak in the atmosphere of a cosy Inn built from...spoilers! Warm up and get refreshed before you head back out to conquer your quest.

Scurry onward through a Victorian market before descending into magical ruins. Complete the trail to uncover another top notch pub where you can kick back and relax.

Distance: 4.7 km
Avg Duration: 2 - 2.5 hours
Number of clues: 15

How it works:
Each clue, sent to your mobile phone, leads you to a new location within walking distance. Solve the clue and search for the answer, reply with the correct answer to unlock the next step. Hints are available if you need a helping hand and you can also receive messages if you're lost.
Have a competitive streak? Your progress is timed and ranked on our leader board, time to challenge your friends!

--"As a born and bred Londoner this was a great day out walking well trodden streets but seeing new things."
--"An amazing way to see the hidden treasures of London! "

Terms & conditions

For a full refund, cancel at least 24 hours in advance of the start time of the experience.

Additional info

  • Not wheelchair accessible
  • This experience requires a mobile phone, with some data or text messages available.
  • Stroller accessible
  • You will be sent a trail of clues that guide you around the city and add a playful touch to exploring.
  • Service animals allowed
  • We will not be there to physically guide you on this trail. If you get lost you can message "Lost" for a detailed route to the next clue. Send "hint" if you think you're in the right location but aren't sure where to find the clue answer!
  • You should be comfortable walking ~5km. Please wear appropriate clothing for walking, the weather and the time of year.
  • Near public transportation
  • There are 2 optional pub breaks on this trail. Use these to get refreshments or skip if you'd like to carry on. We have no affiliation with these establishments.
  • Any further issues please contact us via Facebook messenger.
  • Infant seats available
  • Most travelers can participate
  • This is a private tour/activity. Only your group will participate
  • Confirmation will be received at time of booking


  • A trail of riddles sent to your phone; solve each clue to unlock the path, adventure across the city and discover the hidden sights. Choose either the Telegram App (Recommended) or standard Text Messages (SMS)

Departure time

Team of 4 - Whatsapp
3/23/2022 - 3/17/2025
Monday - Sunday : 08:00 AM - 03:30 PM
Team of 2 - Whatsapp
12/23/2019 - 3/17/2025
Monday - Sunday : 08:00 AM - 03:30 PM
Team of 3 - Whatsapp
3/23/2022 - 3/17/2025
Monday - Sunday : 08:00 AM - 03:30 PM
Team of 5 - Whatsapp
3/23/2022 - 3/17/2025
Monday - Sunday : 08:00 AM - 03:30 PM

Departure point

St. Paul's, Cheapside, London EC2V 6AA, UK

Recent reviews

Norfolk_Tony_67   27th February 2024

star star star star star
Such a well conceived treasure hunt, one of the best I have done. It kept us busy for nearly three hours. The stops en route were perfect and it was great strolling around a part of the city I thought I knew well but learning new features and facts. I'll definitely use these oriole again.

Jet51871605415   1st October 2023

star star star star star
A great way to see the city , learn history and do it at your own pace...built in breaks if you want them..clues were fun and made you think...but not so hard you wanted to give up or get frustrated. Several options in London to choose from based on your interests...their description is spot on in both timing and what to expect

Simon_T   8th September 2023

star star star star star
Great experience. I was expecting something easy but it was challenging! Very happy about that :) Took more than 2.5 hours to complete

432edinp   22nd August 2023

star star star star star
Amazing time and fun hunting! Perfect clues and lots of interesting locations! Great experience if you dont like regular old boring tours!

KierenTI   4th August 2023

star star star star star
We decided to try out CityDays (formerly The Secret City) after being left with a day in London to explore. Other Tripadvisor reviews and the price convinced us to give it a go and we weren’t left disappointed! We chose ‘The City’ as we thought this adventure would be the best place to start to explore London. It was easy to set up and we both received the instructions to our phones via WhatsApp with no issues. The trail clues were, for us, the perfect level of difficulty. Any easier and there would have been no sense of achievement and the entire experience would have been over very quickly; equally any harder and I think we might have had to use more of our HINT or LOST options! The clever stops at pubs and galleries were very welcome and it was smart that stopping at these places didn’t affect your overall time - you simply message when you’re ready to move on and the timer starts again. It took us 3 hours to complete the entire trail - we didn’t rush and took photos along the way. I can confidently recommend this service to everyone and we’ll certainly be getting lost in another city soon!

I5138QBsarahm   3rd July 2023

star star
We were not able to complete in the time advertised. The facts given were written in a very dry manner and not especially interesting. We enjoyed it but I would not return to CityDays.

Nick_M   18th June 2023

star star star star star
Excellent trail. Great way to see and learn about the city. Good fun working as a team to solve the clues!

True2022   3rd June 2023

star star star star star
Great way to explore the unknown London. So many hidden gems, well worth it. So many secret gardens, ruins, tranquil place to enjoy.

TinaOrtu   30th April 2023

star star star star
The quiz was really hard we did not finish it as my phone battery died. So good tip take a battery pack. Some hints were helpful. Would do it again with more than two people!

Peter_S   18th December 2022

star star star star
Really good fun to be shared with friends and enjoyed the facts presented upon completing each stage!

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