One of the oldest and closest to the continent, located on the east of the archipelago, which means it is the farthest of the hot spot of all, about 200 kilometers away from it with no volcanic activity. It is formed by four volcanoes bonded together and is the most humid island due to underground aquifers and fresh water flows. The English named it Chatam because of the British Prime Minister William Pitt of Chatam. It holds the biggest fresh water lake of the archipelago called El Junco, located on the south center part of the island about 660m above sea level. San Cristobal is one of the two only places where the Red Footed Booby can be found in a nesting colony in Punta Pitt visiting site.
This island is the capital of the archipelago, Puerto Baquerizo Moreno, with a population of about 7 thousand people. Human development started on the early 1832, firstly on the highlands on a sugar production settlement. An Interpretation Center was developed in town, where visitors can learn about the biological and historic facts that conform the islands.
Charles Darwin Journey on San Cristobal. This is the first Island visited by Charles Darwin, and his first impression of the dry coast he saw was of a deserted and isolated place. He did not find the tropical richness he expected, but he had the chance to collect the first specie that later on would be the start of his Theory of Evolution, the San Cristobal Mockingbird.
Punta Pitt visitor site is one of the two only places where the Red Footed Booby can be found in a nesting colony and offers an amazing red landscape full of Sesuvium, a very special endemic plant specie that turns color depending on the season. It has a magnificent beach formed with Peridot, a sparkly mineral creation that shines green with sunlight.
Cerro Brujo visitor site is the only place in the archipelago where Red Footed Boobies, Nasca Boobies and Blue Footed Boobies are found nesting together.
Tijeretas visitor site is the very first point that Charles Darwin visited on his journey. Not far from the interpretation center, there is a calm water rocky bay, a magnificent snorkel area and view site for nesting Frigate Birds, animal from which the place takes its name, Tijeretas.
Cerro Colorado visitor site on the southwest side of the island holds the facility of the Tortoise breeding Center, an semi natural area built for the purpose of rebuilding the tortoise population of the island and their conservation.