Thor's Cave (Scan from 1989)

Thor's Cave (also known as Thor's House Cavern and Thyrsis's Cave) is a natural cavern located at SK09865496 in the Manifold Valley of the White Peak in Staffordshire, England. It is classified as a Karst cave. Located in a steep limestone crag, the cave entrance, a symmetrical arch 7.5 metres wide and 10 metres high, is prominently visible from the valley bottom, around 80 metres (260 feet) below. Reached by an easy stepped path from the Manifold Way, the cave is a popular tourist spot, with views over the Manifold Valley. The second entrance is known as the "West Window", below which is a second cave, Thor's Fissure Cavern.
en.wikipedia.org/wiki/Thor%27s_Cave