The oldest mountain ranges in Tenerife rose from the Atlantic Ocean by volcanic eruption which gave birth to the island around twelve million years ago. The island as it is today was formed three million years ago by the fusion of three islands made up of the mountain ranges of Anaga, Teno and Valle de San Lorenzo, due to volcanic activity from Teide. The volcano is visible from most parts of the island today, and the crater is 17 kilometres (11 miles) long at some points. Tenerife is the largest island of the Canary Islands and the Macaronesia region.
Sig Nordal 