Maps: Exp 150,138. A circular walk taking the sites of the former Kent Pits of Chislet, Betteshanger, Tilmanstone and Snowdown (this is an Anytime Challenge and certificates are available for completions, and badges can be obtained for £2)
You can use the interactive controls to zoom in and out and to move around the map, or click on a marker for more info. (interactive map help)