
'Grime's Graves is the only Neolithic flint mine open to visitors in Britain. Visitors can descend 10m (30 feet) by ladder into one excavated shaft and experience at first hand the conditions of Stone Age man 5000 years ago. The unusual landscape of Grime's Graves long confused experts, with its series of gentle hollows and depressions - find out what wacky theories were conceived as explanations!'