Explore Secret Stories The London Mudlark Tour, a self-guided interactive walking tour to enjoy whenever you want. This tour is part of an Ordnance Survey series of bite-sized, tongue-in-cheek stories for you to read out loud. Expect nutty nature, smelly smugglers, raucous royals you get the idea. Discover what lies hidden by the churning water in the River Thames. Some of London’s murky history can best be seen from the banks of the mighty river that runs through its heart. Explore Roman bridges, Tudor theatres, and the most important ravens in the city! Mudlarks are amateur archaeologists who explore history by searching for artefacts on the foreshore of the Thames. Since our ancestors used the river as a dump (boo!) mudlarks find plenty of interesting objects (yay!). You’ll find out what they find and where. Total length: 3.04 miles; Suggested age range: 7+ Purchase this Tour (and more) in the Secret Stories App, available for free download from Android Play and Apple App store. You\'ll find more details of the tour and what it contains in the app!