Canary Islands ocean in the middle of the islands of La Gomera, Tenerife and La Palma; where the laurisilva forests grow. The seven major islands, one minor island, and several small islets were originally volcanic islands, formed by the Canary hotspot. The Canary Islands is the only place in Spain where volcanic eruptions have been recorded during the Modern Era, with some volcanoes still active (El Hierro, 2011). Volcanic islands such as those in the Canary chain often have steep ocean cliffs caused by catastrophic debris avalanches and landslides. The Teide volcano on Tenerife is the highest mountain in Spain, and the
Peñón de Vélez de la Gomera of a small number of Spanish military personnel. Peñón de Vélez de la Gomera is located 119 km southeast of Ceuta. It was a natural island in the Alboran Sea until 1934, when a huge thunderstorm washed large quantities of sand in the short channel between the island and the African continent, turning it into a tombolo. Ever since, it has been a peninsula, currently connected to the Moroccan coast by an 85 m long sandy isthmus, the world's shortest single land border segment. With a length of 400 meters northwest-southeast and a width of up to 100 meters, it