Turn the historic streets of Old Portsmouth into the world's largest escape room with 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 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 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.