The Peak District is an area, mostly within north Derbyshire, in the midlands of England. Administratively, it falls within several other local authorities, but many functions are carried out by the authority for the National Park named after it. Conventionally, it is divided into the "White Peak" and the "Dark Peak". The White Peak, the older limestone country to the south, has picturesque gorges and notable limestone caverns. The "Dark Peak" is the more dramatic gritstone moorland to the north. The stony Edges in this area are much used by rock-climbers.