Folklore

Castle Hill (Castleton)
Sacred Hill

In addition to stubob’s post:

Many persons in Castleton are said to believe, that the Sun appears to dance up and down at its rising on Easter Sunday Morning, when viewed from the top of the Castle Hill adjacent; and that numbers repair thither, almost annually, in expectation of seeing it! By others, the Sun is said to illuminate more of the surface of that deep valley, in the shortest days, than it did some years previously!

p627 in ‘A General View of the Agriculture and Minerals of Derbyshire’ by John Farey (1817) – on Google Books.