Located east of Puerto Villamil is a remarkable semi-submerged lava formation known as Tortuga Island. It is a really good site for the geology, but also for the early colonizer vegetation and the wildlife, not just Marine Iguanas and Blue-footed Boobies, but myriads of reef fish as well as sharks, rays, turtles and whales. On the coast there are mangroves where Brown Pelicans nest and you may also see the Galapagos penguin, herons and coast birds.