The legendary Galapagos Islands home to Post Office BayGalapagos Island Floreana, also known as Charles or Santa Maria Island, is the southeasternmost island in the archipelago.
It is one of the smaller of the major islands, measuring approximately 12 by 15 km and rising to an elevation of 640 m (2000 feet). The oldest lavas on Floreana are 1.5 million years old, making it one of the older islands. At the border of the Island, Captain Porter of the U.S.S. Essex reported witnessing an eruption in the center of the island in July 1813. Though the products of this eruption have not been identified, there are a number of young flows and the island is covered with many young pyroclastic cones (pyroclastic cones are produced when lava it was thrown into the air explosively), particularly in the highlands. All of these observations testify that Floreana remains an active volcano.
Floreana is one of the few islands with a reliable supply of fresh water, an artesian spring at the base of Cerro Olympus in the lush southeast highlands. The Floreana race of giant tortoises was extinct by 1846. However, flamingos may still be seen in Flamingo Bay and sea turtles may be seen nesting on the beach near Cormorant Point.