The Mystery of Nelson's Stolen Diamonds

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Discover tales of drunkenness, murder, and treason as you hunt the historic streets & taverns of Old Portsmouth for a mysterious diamond thief in this self-guided treasure hunt adventure!

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 Portsmouth diamond thief!

'The perfect blend of Portsmouth, puzzles, and history!'


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's 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.

- A 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.
- 5 traditional pubs en route.
- Packed full of amazing local history stories.
- Walking distance: 3km
- Duration: 2-3 hours

How to book

Book online via TripAdvisor using the following link:

Alternatively, order a copy of the activity book to your address via

Book Tickets

Guide Prices

From £9.99



TripAdvisor Traveller Rating:

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    Recent Reviews:

    • Sperenzo
      Trip Type:
      An amazing Brighton adventure!
      5 of 5 stars
      Tuesday, 6th July 2021
      Truly was an amazing Brighton adventure! Loved exploring the city and learning new things! Highly recommend! Read full review
    • 235Alan
      Portsmouth, United Kingdom
      Trip Type:
      Great SOUTHSEA Experience
      5 of 5 stars
      Saturday, 7th August 2021
      A really interesting, fun and informative treasure-hunt. We did the SOUTHSEA Adventure (new for summer 2021). The museum at the start was excellent and really put us in the mood for further... Read full review
    • AnnieNearSouthampton
      Near Southampton
      Trip Type:
      Exploring Southsea enjoying a mystery.
      5 of 5 stars
      Monday, 13th September 2021
      Plenty of places to stop for refreshments. We parked near The Parade tea Rooms at Western Parade and had coffee and then walked to the museum to start. Lunch at Southsea Castle. Cuppa near the... Read full review

    Map & Directions


    • Discover Mystery Guides

    The Mystery of Nelson's Stolen Diamonds

    Type:Walking Tour

    Starts at the Nelson Statue, Old Portsmouth, Hampshire, PO1 2ND

    TripAdvisor Traveller Rating

    TripAdvisor Traveller Rating - 79 reviews79 reviews

    Opening Times

    The Mystery of Nelson's Stolen Diamonds (1 Jan 2021 - 31 Dec 2021)

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