The Mystery of Nelson's Stolen Diamonds

Book Tickets Online


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 for click and collect via the official Mystery Guides website.

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:

    • jennysB6341EL
      Trip Type:
      Great fun exploring Bristol
      5 of 5 stars
      Saturday, 15th January 2022
      We did the Georgian Bristol Mystery Adventure: The Amazing Flying Machine today as a team of three - 1 adult (me) and two 12 year olds, who rated it as "good" and "great". They solved all the puzzles... Read full review
    • fhelseam
      5 of 5 stars
      Tuesday, 17th May 2022
      Amazing book. If your visiting Portsmouth would highly recommend doing so much history in the area to find Read full review
    • troodaki
      Portsmouth, United Kingdom
      Trip Type:
      Fabulous cannot recommend enough
      5 of 5 stars
      Wednesday, 18th May 2022
      We have completed most of the guides and did Winchester yesterday , amazing fun a real experience and unusual way to walk through a city ,, if you love walks ,mysteries,or just looking at a city in... 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 - 124 reviews124 reviews

    Opening Times

    The Mystery of Nelson's Stolen Diamonds (1 Jan 2022 - 31 Dec 2022)

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