In reply to SomeBlokeCalledTom:
Theres one up at Hollowstones under Scafell Crag, not the biggest but you can sleep under it!
Priest Hole cave is much bigger on Dove Crag and the one up Langstrath- the latter a bit abused unfortunately.
Loads of good caves and mines in the area but can be a bit drippy and damp.
Post edited at 20:53