Explore Secret Stories RGS The Key to the Kingdom: Dover Tour, a self-guided interactive walking tour to enjoy whenever you want. A short walk around Dover Harbour. This tour forms part of the Discovering Britain series created by the Royal Geographical Society (with IBG) to delve deeper into Britain\'s landscapes. For centuries Dover has been the literal and symbolic gateway between Britain and Europe. Located just 21 miles from France, Dover\'s history is entwined with 2,000 years of travel, trade, adventure and defence.  Dover has welcomed visitors from medieval pilgrims to modern tourists and fought invaders from Roman legions to Nazi pilots. Meanwhile, the iconic White Cliffs have inspired generations of writers and artists. This walk takes you on an adventure through the town to hear some of its surprising stories.  Total length: 2 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!