Formosa (Guinea-Bissau)
Formosa is an island in the Bissagos Islands, Guinea-Bissau and forms a part of the sector of Caravela. Its area is 140 km², its length is 19.93 km and its width is 10 km. The main city is Abu. It is located just off the West coast of the northern half of Africa.
Nearby islands includes Ponta and Maio to the north and Enu and Edana to the south.
Coordinates: 11°29′N 15°58′W / 11.483°N 15.967°W
...
Wikipedia