Derwent Valley - Home of The Dambusters
Ladybower Reservoir is historically significant as the place Guy Gibsdon and his men trained for the raid on the dams of the Ruhr Valley. The whole of the Derwent Valley in which the dam is located is a prime hill walking area in the Dark Peak area.
https://www.peakdistrict.gov.uk/visiting/miles-without-stiles/derwent-dam