The Llano de Ucanca, part of the Teide National Park, is seen at sunset in Tenerife
The Llano de Ucanca, part of the Teide National Park, is seen at sunset in Tenerife, Spain's Canary Islands, June 11, 2011. The volcano is 3,781 metres high, according to the UNESCO website for the park. It is active, but its last eruption was in 1798. Teide National Park was declared a World Heritage Site by UNESCO in 2007. Picture taken on June 11, 2011. REUTERS/Santiago Ferrero (SPAIN - Tags: ENVIRONMENT TRAVEL)