Slate mining defined the history of Elm and the Sernft Valley right up into the 19th century. Today the "Landesplattenberg Engi", a former slate mine, is open for guided tours.
Up until 1,900 years ago a terrifying dragon is said to have been up to mischief in a large cave at Lake Thun. Only the wandering Irish monk Beatus succeeded in driving away the dragon. Today the marvelous grotto world can be entered without risk.