and sheep's fescue (Festuca ovina). Lesser meadow-rue (Thalictrum minus) grows extensively on ledges in the dale. At the southwestern extremity of the dale as it merges into the moorland between Castleton and Peak Forest are the remains of several old lead mines. The Hazard Mine lies at grid reference , and was one of the major mines of the area. Over 5000 tonnes of lead ore were mined and the main shaft goes down . The Hollandtwine Mine lies to the east. Drainage from both mines went directly into Peak Cavern. In 1983 Cave Dale was the scene of the murder of a 21-year-old Manchester Polytechnic student, Susan Renhard. Norman Smith, a local 17-year-old, was subsequently gaoled for life at Nottingham Crown Court in 1984. Cave Dale features in the films The Princess Bride (1987) and The Other Boleyn Girl (2008). Notes References Landforms of Derbyshire Climbing areas of England Valleys of the Peak District Canyons and gorges of England