On each island, the number of visitors are limited and there are only a small number of official landing and visitor sites. You must follow the instructions of your guide to protect the wildlife and you are not allowed off the marked paths. This is not a problem as the animals are so tame they will sit right on the path or cross it without caring about mere tourists.
The Charles Darwin foundation (http://www.darwinfoundati...) administers several research stations throughout the islands, including a large station in Puerto Ayora that is worth visiting for its animal and natural history exhibits, the Galapagos Interpretation Center in Puerto Baquerizo Moreno and the Tortoise Breeding Center are the most interesting of the breeding centers in Puerto Villamil.
