Llechwedd Slate Caverns
At these caverns you can descend 500 feet on Britain's deepest underground railway to a mine where you walk by an eerie underground lake. Here Victorian working conditions have been re-created, and the tour gives a good idea of the difficult lives the miners had to endure. Part of the mine is now used as a space to mature cheese. Wear sturdy footwear when visiting the mine—during busy times you may have to climb 70 steps as part of the tour.
