Explore Secret Stories Roman London Tour, a self-guided interactive walking tour to enjoy whenever you want. This audio tour is part of an Ordnance Survey series of bite-sized, tongue-in-cheek stories. Expect nutty nature, smelly smugglers, raucous royals you get the idea. Venture into the modern City of London to discover the first city of Londinium, built by the Romans in the 1st century AD. From ancient walls, bridges and roads to a hidden amphitheatre, this walk takes you on a journey to discover what the Romans really did for us - and how we know they loved fish sauce. Total length: 2.36 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!