Chatham Island Isla San Cristóbal

San Cristóbal is the eastern-most island in the archipelago and maintains the second largest population. The island is home to the oldest surviving settlement in the Galápagos, El Progresso settled in 1869. Today the most important town on the island is Puerto Baquerizo Moreno (pop. 4,000), the capital of the Galápagos. It is also one of two points of departure for tour boats in the Galápagos, although it is less visited than Isla Santa Cruz.

The island is actually two coalesced volcanoes. El Junco Lagoon, in the higher elevations of San Cristóbal is one of the few freshwater lakes in the Galápagos.

The island is home to the Chatham mockingbird, which is only found on San Cristóbal.