 At the western end, the massif encloses a high basin called the Annapurna Sanctuary.The highest peak of the massif, Annapurna I Main, is the tenth highest mountain in the world at above sea level.Maurice Herzog led a French expedition to its summit through the north face in 1950, making it the first of the eight-thousanders to be climbed and the only 8,000 meter-peak to be conquered on the first try.