Tenerife is the largest of the Canary Islands, a Spanish possession located off the northwestern coast of Africa. The central feature of this astronaut photograph is the elliptical depression of the Las Cañadas Caldera that measures 170 square kilometers (about 65 square miles).
Sinuous, channelized lava flows are the most striking volcanic features visible in this astronaut photo of Teide and Viejo Volcanoes on Tenerife Island.
This natural-color image from the Landsat satellite on October 5, 2000, shows El Aguajito Caldera, Las Tres Vírgenes, and La Reforma Caldera on the Baja Peninsula.
Formed during four explosive eruptions that took place between 300,000 and 90,000 years ago, the volcanic caldera is now home to human settlements and 17 younger volcanoes.