Tenerife is the largest and most populous island of the Canary Islands. The island of Tenerife receives about 5 million tourists each year, making it the most popular island for tourists. Tourist attractions here include nightlife, walking, and whale-and bird-watching. Loro Parque (meaning Parrot Park) on Tenerife has a collection of 3,000 parrots. However, most of these parrots cannot be seen by visitors. There is another facility south of the main park where approximately 330 parrots species are kept and a breeding program takes place. Other attractions in the park include alligators, chimpanzees, jaguars, penguins, porpoises, Killer Whales, sharks, and tigers. San Cristóbal de La Laguna is a World Heritage Site. Tenerife also has the highest elevation of Spain, a World Heritage Site that is the third largest volcano in the world from its base, El Teide. Teide is the most visited national park in Spain, with a total of 2.8 million visitors, according to the Instituto Canario de Estadística (ISTAC), and it is one of the most visited National Parks in the world.