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
Sierra del Toro Its summits are usually covered in snow in the winter and are among the highest peaks of the Land of Valencia. Therefore there are also numerous ancient ice houses. These mountains have been often devastated by forest fires in hot and dry summers and extensive planting of trees has been undertaken. This mountain range was the scenario of violent battles during the Spanish Civil War (1936–1939) when the fascist troops tried to split the Spanish Republican government territory in two and reach the Mediterranean coast and there are many remains of trenches. Sierra del Toro Sierra del Toro () is