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 of Genoese navigator Lancelotto Malocello, who used the alias "Lanzarote da Framqua". A fort was later built in the area of Montaña de Guanapay near today's Teguise. Castilian slaving expeditions in 1385 and 1393 seized hundreds of Guanches and sold them in Spain, initiating the slave trade in the islands. French explorer Jean de Béthencourt arrived in 1402, heading a private expedition under Castilian auspices. Bethencourt first visited the south of Lanzarote at Playas de Papagayo, and the French overran the island within a matter of months. The island lacked mountains and gorges to serve as hideouts for the remaining