The cave gazetteer at CAPRA http://www.shef.ac.uk/~capra/1/caves.html#The%20map%20below explains that pottery and skeletons from the Neolithic and Early Bronze ages were found in the caves inside Elbolton. Finds are in the Craven museum in Skipton.
There are so many caves here with many weird names. Elbolton Cave /Pot itself is also known as Navvy Noodle Hole and Knave Knoll Hole. It is rather a strange landscape with these entrances to worlds below - it is any wonder it is famed as the haunt of fairies?
A tale related in the Readers Digest 'Folklore Myths and Legends of Britain' mentions them - and they weren't very nice ones either. A man from Burnsall was walking home in the moonlight, when he was surprised to come across a crowd of them dancing. They hadn't seen him so for a while he tried to keep quiet, watching their antics. However, (quite well-meaningly I feel) he eventually piped up: "Na' then, Ah'll sing a song if tha loikes." But the fairies were not impressed and actually beat him up. His bruises lasted for ages.