Manifold Valley in the Staffordshire part of the Peak District contains a number of mainly small caves.  Three of these caves are worth a further investigation.  Above Wetton Mill is Nan Tor Cave,  an obvious rock shelter with several entrances and a central chamber that is open to the sky.  Nearby is Thor's Cave with it's large entrance staring out from a prominent crag.   A bit further down from Thor's Cave in the bed of the River Manifold is Ladyside Pot, a difficult  and dangerous cave that can only be explored in dry and settled weather.