Explore Secret Stories RGS Chalk and Water: Chiltern Hills Tour, a self-guided interactive walking tour to enjoy whenever you want. A circular walk crossing the Ridgeway in Oxfordshire. This tour forms part of the Discovering Britain series created by the Royal Geographical Society (with IBG) to delve deeper into Britain\'s landscapes. - Go on a voyage of discovery in the stunning Chiltern Hills; - Walk an escarpment with views of the Vale of Oxfordshire; - Discover how the rocks under your feet shaped the land. Total length: 4.49 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!