This is a small cave (impossible to go into) that the highwayman Per Gynte lived in during the 16th century when he was hiding from justice. Drive towards Leksand from Borlange and then turn right towards Amsberg and then towards Falun and you'll see the sign on the left. There's a stony path 1 km to walk to this place where you can sign the guestbook and look at the view.