San Cristóbal (
Chatham) is the easternmost
island in the
Galápagos archipelago, as well as one of the oldest geologically.
San Cristobal Island is composed of 3 or 4 fused volcanoes, all extinct. It is home to the oldest permanent settlement of the islands and is the island where Darwin first went ashore in 1835. A small lake called
El Junco is the only source of fresh water in the islands. The availability of fresh water is what led to the early settlement of San Cristobal.
San Cristóbal has an area of 558 km and its highest point rises to 730 metres. The population is approximately 6000. San Cristóbal is the most fertile island of the archipelago and is the second most populated after Santa Cruz. The capital of the archipelago,
Puerto Baquerizo Moreno, lies at the south-western tip of the island.
Source: Wikipedia
