This chasm of debris and enormous rock masses was caused by a gigantic mine that on March 13, 1918, shattered the saddle between the Austrian and Italian Denti, shattering and changing the morphology of the northern slope of the latter.
During the First World War, at this point on Pasubio, the two enemy lines found themselves very close to each other, neither able to gain the upper hand. Eventually, with the onset of winter, each side barricaded itself on its own Denti, transforming it into a veritable fortress and underground city. Both commands then decided the only solution was to blow up the enemy stronghold from the foundations: thus began the war of mines and countermines, with a dense network of offensive tunnels (trying to get under the enemy) and defensive ones (mostly Italian, trying to intercept the enemy tunnel by the noise of the excavations and stop it with an explosion). Between the autumn of 1917 and the spring of 1918, there were 10 explosions, 5 Austrian and 5 Italian, until the gigantic 50-ton Austrian dynamite charge at 4:30 a.m. on March 13, 1918, which killed 52 Italian soldiers and, due to a backfire, also 3 Austrians.
The film passes right over the remains of that event, with irretrievable soldiers still buried deep underground for over 100 years.
Plaque: "Under these shattered rocks lie the Italian soldiers surprised by the explosion of the Austrian and Italian mines (March 13, 1918) / C.G.O.C.G. [General Commissioner for the Honors of the Fallen in War - Ministry of Defense] 1973."