 The entire massif and surrounding area are protected within the Annapurna Conservation Area, the first and largest conservation area in Nepal.The Annapurna Conservation Area is home to several world-class treks, including Annapurna Sanctuary and Annapurna Circuit.Historically, the Annapurna peaks have been among the world's most treacherous mountains to climb with the particular case of the extremely steep south face of Annapurna I Main - a wall of rock that rises 3,000 meters (9,800 feet) - making it one of the most difficult climbs in the world.