 Peveril Castle ( also Castleton Castle or Peak Castle ) is a ruined 11th @-@ century castle overlooking the village of Castleton in the English county of Derbyshire . It was the main settlement ( or caput ) of the feudal barony of William Peverel , known as the Honour of Peverel , and was founded some time between the Norman Conquest of 1066 and its first recorded mention in the Domesday Survey of 1086 , by Peverel , who held lands in Nottinghamshire and Derbyshire as a tenant @-@ in @-@ chief of the king . The town became the economic centre of the barony . The castle has views across the Hope Valley and Cave Dale . 
