Check out this rather stunning drone video of a well-known castle town in the mountains of Slovenia, compliments of contributor Kolman Aerial. It's called Kamen Castle, and it's at the entrance to the Draga Valley near the country's northern border with Austria. Distinguished by its square Romanesque tower, the castle dates to the 12th century. The castle was expanded in the 16th century with the addition of a residence; its owners abandoned it in the 18th century. The landmark is open to the public.