Incahuasi Central Volcanic Zone of the Andes together with about 110 other Quaternary volcanoes, and lies in the southern sector of the volcanic zone; other volcanic zones in the Andes are the Northern Volcanic Zone, the Southern Volcanic Zone and the Austral Volcanic Zone. The history of volcanic activity is poorly known for most of these volcanoes owing to the lack of dating; only a few historical eruptions have been recorded, such as an eruption at Ojos del Salado in 1993. Incahuasi is located northeast of Ojos del Salado, the highest volcano in the world. Both volcanoes are found at the
Hills and mountains of the Isle of Man Hills and mountains of the Isle of Man The Isle of Man is mostly hilly, but has only one summit, Snaefell, classified as a mountain (over 2,000 feet). The south of the island has a small coastal plain around Castletown and Ballasalla but is otherwise hilly. In the south west these hills rise to more prominent peaks, notably South Barrule (483 m), and Cronk ny Arrey Laa (437 m) which drops almost vertically into the sea. A central valley separates the southern hills from the central range which contains the highest peaks. This central range contains 11 out of 12