Canary Islands 29% of Britons, 22% of Spanish, not residents of the Canaries, and 21% of Germans). Among the islands, Tenerife has the largest number of tourists received annually, followed by Gran Canaria and Lanzarote. The archipelago's principal tourist attraction is the Teide National Park (in Tenerife) where the highest mountain in Spain and third largest volcano in the world (Mount Teide), receives over 2.8 million visitors annually. The combination of high mountains, proximity to Europe, and clean air has made the Roque de los Muchachos peak (on La Palma island) a leading location for telescopes like the Grantecan. The islands, as
Lanzarote support of the King of Castile) came and fought the local Guanches, who were further decimated. The islands of Fuerteventura and El Hierro were later similarly conquered. In 1477, a decision by the royal council of Castile confirmed a grant of Lanzarote and Fuerteventura, with the smaller islands of Ferro and Gomera to the Castilian nobles Herrera, who held their fief until the end of the 18th century. In 1585, the Ottoman admiral Murat Reis temporarily seized Lanzarote. In the 17th century, pirates raided the island and took 1,000 inhabitants into slavery in Cueva de los Verdes. From 1730 to