The London Countryway is an orbital walking trail around London which was originally devised by LDWA and Ramblers volunteer Keith Chesterton in the late 1970s. The route never actually enters Greater London but runs through the countryside of neighbouring counties. The surroundings are hugely varied, ranging from dead flat fens to rugged chalk hills, rich in cultural and heritage interest and an outstanding showcase for London's protected green belt. The trail is easily walked as a series of day walks from London using public transport. Highlights of the route include the Chilterns, Kent Downs, Surrey Hills, Broxbourne Woods National Nature Reserve, Chobham Common National Nature Reserve, Thames Chase, Watling Chase, the Lee Valley, Basingstoke Canal, Lee Navigation, Wey Navigation, Windsor Great Park and Castle and Epping Forest.