An alpine shelter in the Italian Dolomites, constructed during World War I at an altitude of 9,055 feet above sea level. During World War I, the Italian Front became one of the most extreme battlefields in Europe, with soldiers fighting not only enemy forces but also the harsh conditions of the Dolomites. At altitudes above 2,700 meters (9,055 feet), troops faced freezing temperatures, heavy snowfall, avalanches, and thin air while battling across some of the world’s most difficult terrain. To survive, armies built shelters into cliffs, beneath rock overhangs, and inside the mountains themselves. These positions protected soldiers from artillery fire and the brutal alpine climate, but constructing them required incredible effort. Supplies and building materials had to be transported up steep slopes by hand, pack animals, or mountain cableways, and many positions remained occupied throughout the year. Although the Dolomite Front saw fewer large-scale offensives than the trenches of Western Europe, the fighting was still deadly. Thousands died from frostbite, exposure, avalanches, and falling debris, while both sides carved tunnels through the mountains to create hidden barracks, hospitals, ammunition storage areas, and artillery positions. One of the most remarkable achievements of the Alpine Front was the creation of underground “ice cities” beneath glaciers. The largest, built beneath the Marmolada Glacier, featured miles of tunnels containing sleeping quarters, kitchens, workshops, and storage areas carved directly into the ice. At its peak, it housed hundreds of Austro-Hungarian troops, allowing them to live and operate beneath the glacier while remaining hidden from enemy forces. Today, many of these shelters and tunnels remain preserved, offering a glimpse into one of the highest and most challenging battlefields in military history.(Historic Vids)