Turn the historic streets of Old Portsmouth into the world's largest escape room with this self-guided treasure hunt tour!<br><br>18 clues to solve, 5 pubs to discover, and one elusive diamond thief to catch!<br><br>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.