It has the biggest and longest lava flow, which is located in Sullivan Bay. Geologically speaking, this island is one of the most beautiful and unbelievable formations. The vast basaltic landscape performs smooth and unbroken surfaces with undulations and nods formed by the fluid lava that created the sculpture. It is located on the central west of the archipelago and is formed by two overlapping volcanoes. It is the 4th biggest of the archipelago.
It is an unpopulated island.
In Puerto Egas explore deep pools and caves carved from the lava shoreline, home to playful Galapagos fur seals as well as a variety of resident and migrant bird species.
Sombrero Chino offers a spectacular snorkel, swimming by a channel of shallow water, nursery of thousands of marine species and a small colony of penguins
Conservation. Something to notice today in this island is the absence of the thousands of land iguanas that Charles Darwin mentioned on his diary. They completely disappeared due to the presence of introduced species; especially goats and rodents that today, are gone. This is the biggest island on earth where introduced animals were eradicated. Tortoises have the chance now to repopulate the island, and they can be seen more and more often in our visits.
Charles Darwin Journey on Santiago. This is the island where Darwin stayed the longest, he knew already that the islands were something bigger and more important than they seemed when he first arrived, so on his visit, he expend 2 weeks and walked the whole island. Here he first noticed the difference in between the tortoises from different islands, which had different shapes and sizes.