Boštanj (Weissenstein in German) castle was probably built in the late 1400s to the site of ancient fort. In 1558 it was expanded and surrounded with walls and towers. In 1678 the castle was bought by the family Ursini-Blagaj, who owned the castle until the 20th century. In 1944 the castle was burned down by Slovenian partisans.
Redipuglia is the largest Italian Military Sacrarium. It rises up on the western front of the Monte Sei Busi, which, in the First World War was bitterly fought after because, although it was not very high, from its summit it allowed an ample range of access from the West to the first steps of the Karstic table area.
The monumental staircase on which the remains of one hundred thousand fallen soldiers are lined up and which has at its base the monolith of the Duke of Aosta, who was the commanding officer of the third Brigade, and gives an image of a military grouping in the field of a Great Unity with its Commanding Officer at the front. The mortal remains of 100,187 fallen soldiers lie here, 39,857 of them identified and 60,330 unknown.