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. The cave was known until the mid 19th century as the Trou aux Fayes or "Sheep Hole," as it was used as a sheepfold.