Santa Cruz is the center of tourism in the Galapagos. The white-sand beach of Las Bachas on Isla Santa Cruz is a major egg-laying site for Pacific green turtles, but pelicans and flamingos feel at home here, too. Puerto Ayora, the largest settlement in the Galapagos, is homeport to many yachts, as well as home to Galapagos National Park Service and Charles Darwin Research Station. A large island with a variety of geology, wildlife and vegetation, all the Galapagos life zones are present on Santa Cruz.