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Turn the historic streets of Old Portsmouth into the world's largest escape room with this self-guided treasure hunt adventure!


Start any time you like... simply collect the treasure hunt activity book from The Dolphin pub in Old Portsmouth by showing your payment receipt and away you go!

Solve a range of cryptic clues including word games, maths puzzles, and hidden objects, as you unravel the historic mystery and discover the identity of the infamous diamond thief!
On Horatio Nelson's last day on dry land before joining his ship to fight in the Battle of Trafalgar, he stored a valuable diamond necklace in a chest in one of Portsmouth many taverns for safekeeping. That night, the tavern was broken into and the necklace was stolen. You must solve the clues, eliminate suspects, and return to the scene of the crime to get to the bottom of this historic mystery. 
This treasure hunt is the best way to see the key historic sights of the city, visit its most atmospheric taverns, and soak up true local stories of its most notorious characters and places.
'The perfect blend of Portsmouth, puzzles, and history!'
- 44-page colour activity booklet containing all puzzles, clues, and maps. 
- 15% off food & drink in The Wellington pub. 
- 10% off food & drink in The Dolphin pub.
- Walking distance: Approx. 3km, Duration: 2-3 hours

Nelson's Stolen Diamonds: 2 x booklets (Collect at starting point)

  • This is a self-guided tour, the 44-page guided activity booklet can be collected from behind the bar @ The Dolphin pub at any time between 12pm and 8pm when showing your payment receipt: 41 High St, Portsmouth PO1 2LU. 

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