The Grotte aux Fées ("Cave of the Fairies") in the cliffs above Saint-Maurice, Switzerland is a natural limestone solution show cave, featuring a 77-metre (253 ft) high underground waterfall, claimed as the world's highest waterfall in a show cave. The cave was the first show cave in Switzerland.[1] The cave was known until the mid 19th century as the Trou aux Fayes or "Sheep Hole," as it was used as a sheepfold. The cave was known from Roman times, but was first publicized in 1863 as a tourist attraction, with the present name being used from 1865.[2]