About 500 km southwest of
, Annobon is a small island in the bight of Biafra. Locally known as Pagalu, the island is about 8 kilometers from north to south and about 3 kilometers wide with a total area of land of about 17 square km. It is mountainous and there are three remarkable peaks on it. In the north it is Pico del Fuego (454meters), in the centre Pico del Centro (630 m) and in the south Pico Surcado, about the same hight. Pico Surcado is an extinct volcano, and a lake is situated in its former crater.
The village of San Antonio, inhabited by about 400 people, is the biggest town. It is located just south of Punta del Palmar. There is a christian missionary station in its vicinity.