The ruin of Castel Casanova , also called the ruin of Castel Maultasch, was probably built at the beginning of the 13th century as a dual fortress consisting of a road block on the road in the valley and the actual fortress at the top of the rocky promontory. Local regent Margarethe, Countess of Tirol and Duchess of Carinthia - also called Maultasch - is said to have stayed here frequently. The name “Maultasch” is said to have been used for Margarethe because of her misshapen mouth or her loose tongue.
A steep hiking trail leads  up to the ruins in 20 minutes.