The Mystery of Nelson's Stolen Diamonds

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About

Turn the streets of Portsmouth into a 'whodunnit' treasure hunt adventure!

Discover Portsmouth's amazing history and secret hidden gems
Combine your skills to crack the clues and unravel the epic tale
Experience a one-of-a-kind adventure to treasure with your friends
Includes five historic taverns en route

On Nelson's last day on dry land, he stored a valuable diamond necklace in an old Portsmouth tavern. But that night.. someone snatched it! Was it stolen for money? Or an act of revenge? Nobody knows. But the villain left a trail of clues, and this is where you come in...

The pages of your Mystery Guide™ take you on an exciting puzzle adventure through the heart of Portsmouth, as you follow the maps, unlock the clues, and unravel the epic tale. Plus, an exciting twist awaits…

Make it to the end and you'll be struck by an amazing 'wow' moment when the case is solved and the villain is revealed before your eyes! Simply grab your Mystery Guide™, head to the start, and set off at a time that suits you.

Don't let the villain get away... Your time to start is now!

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

Details:
Walking distance: 3km
Duration: 2-3 hours

Please note: bank holidays may affect opening hours.

Book Tickets

Guide Prices

Ticket TypeTicket Tariff
Mystery Guide£19.99 activity

Note: Prices are a guide only and may change on a daily basis.

TripAdvisor

TripAdvisor

TripAdvisor Traveller Rating:

4.9 of 5 stars
    • Excellent
      1939
    • Very Good
      140
    • Average
      25
    • Poor
      9
    • Terrible
      9

    Recent Reviews:

    • Tania B
      London Fleet Street Mystery guide
      5 of 5 stars
      Thursday, 5th June 2025
      This was our 5th Mystery Guide, 2nd in London and like the others, it definitely didn’t fail to impress us. We always love the attention to detail and find out real facts. The mystery of the Holy... Read full review
    • Inspire812496
      Newcastle Mystery
      5 of 5 stars
      Monday, 9th June 2025
      I cannot recommend Mystery Guides enough, the perfect balance of fun and challenging. After living in Newcastle all my life, it took us to places within the city I had never been before and we learnt... Read full review
    • Lucy B
      Great adventure, great to see new parts of the city.
      5 of 5 stars
      Monday, 9th June 2025
      We did the Plymouth mystery guide, it was brilliant so nice to see different parts of the city the you walk past that you wouldnt notice or stop to look at. Only one difficulty just due to additional... Read full review

    Map & Directions

    Video

    • Discover Mystery Guides

    Portsmouth Treasure Hunt: 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 - 2121 reviews2121 reviews

    Opening Times

    The Mystery of Nelson's Stolen Diamonds (1 Jan 2025 - 31 Dec 2025)

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