Fiemme Valley (Italian: Val di Fiemme, German: Fleimstal) is a valley in the Trentino province, i.e. the southern half of the Trentino-Alto Adige/Südtirol region, in northern Italy, located in the Dolomites mountain region.In Classical Antiquity, the valley was part of the Cisalpine Gaul province of the Roman Empire.In 1920 with the Treaty of Saint-Germain-en-Laye at the end of the first World War it was annexed to the kingdom of Italy.The area near Cavalese has seen two major cable car disasters, one in 1976 and one, caused by a United States Marine Corps airplane flying too low, in 1998.In 1985, the Val di Stava Dam collapse killed 268 people in Tesero.