Contributor Daniele Bolgia created this stunning drone video of Forte Vezzena in northern Italy. It sits atop Mt. Vezzena, part of the Vicentine Prealps in the Trento province. It was a key position in a string of fortifications constructed by Austria-Hungary in the years leading up to World War I, when the area was part of that empire. Once Italy joined the conflict on the Allied side in 1915, the fort was under near-constant artillery bombardment. Despite suffering significant damage, it never gave way.