The province of Belluno is rather wide, and almost entirely occupied by mountain areas. It encompasses the natural and historical regions of Cadore, Feltrino, Alpago, Val di Zoldo, Agordino, Comelico and Ampezzano. The eastern part of the province features the Dolomites, including the famous Tofane, Marmolada, Tre Cime di Lavaredo and Antelao. The province is rich in water, with the presence of the wide Piave River, with its affluents Boite and Cordevole.