White Scar Cave, a few kilometres along the B6255 from Ingleton toward Hawes, is the longest show cave open to the public in Britain. The cave runs through the limestone of Ingleborough, and guided tours follow a route of about a mile through a series of chambers and passages, crossing underground streams on bridges and ducking through formations of stalactites and flowstones.
The cave was formed by water dissolving the Carboniferous limestone over millions of years. The largest chamber, the Battlefield Cavern, is 100 metres long and contains formations that have been growing for tens of thousands of years. The temperature underground is a constant 8°C regardless of the season — colder than you might expect; a jacket is worth carrying even in summer.
Tours run throughout the year but call ahead or check the website before visiting — the cave occasionally closes after heavy rain if the water levels rise. The walk up to the cave entrance from the car park takes about ten minutes. The interpretation on the geology and formation of the cave is well done for a commercial show cave.