Teide

Surprisingly, Spain's highest peak is not even on the mainland. It is also not really a mountain, but rather a volcano, with a height of 12,195 feet. Mount Teide is one of the world's largest volcanoes and is located in the Canary Islands of Tenerife. It was formed 120,000 years ago during a landslide produced by the eruption of the old Las Caadas volcano and is one of the most stunning examples of volcanic activity on the planet.

The volcano is currently active, with the most recent eruption taking place in 1909. The knowledge that Teide could erupt again at any time does not deter people from visiting. Mount Teide is part of the popular Teide National Park, which has been designated as a UNESCO World Heritage Site since 2007. This is Europe's most visited national park, and Mount Teide is Spain's most visited natural site.

Location: Tenerife, ‎Canary Islands‎, ‎Spain
Height: 3,718 meters (12,198 feet)
Range: Canary Islands (Tenerife)