San Cristobal Island is the fifth biggest island of the Galapagos. It is lozenge-shaped, about 30 miles long and 10 miles wide. The highest point, is 2,395 feet. It is comprised three or four fused volcanoes—all extinct. The Ecuadorians named it San Cristóbal after Saint Christopher, the patron saint of travelers.
It is the only island with permanent fresh water, located near the top of the island in a small lake called El Junco. Because of the water, the island was settled early in Galapagos history, and was the home of the islands' governor when Darwin visited in 1835.