In the middle of the Island of Tenerife sits Mount Teide, which is 3718 meters high and is the highest mountain in Spain.
It's also the world's third largest ocean-island volcano and is still active! Although the last eruption occurred in 1909.
Access to the summit is either by foot (for which a permit is required) or by cable car that will carry you almost to the summit.
On a clear day, like this, the views are breathtaking in one direction Gran Canaria in the other La Palma, La Gomera and El Hierro.