Lud's Church (sometimes written as Ludchurch) is a deep chasm penetrating the Millstone Grit bedrock created by a massive landslip on the hillside above Gradbach, Staffordshire, England. It is located in a wood known as Back Forest, in the Dark Peak, towards the southwest fringe of the Peak District National Park about 4 kilometres (2.5 mi) west of the A53 between Leek and Buxton.