God's Finger, a rocky formation of Serra do Mar near Rio de Janeiro

Serra do Mar (Portuguese: Sea's ridge or Sea ridge, [ˈsɛʁɐ du ˈmaɾ]) is a 1,500 km long system of mountain ranges and escarpments in Southeastern Brazil, which runs in parallel to the Atlantic Ocean coast from the state of Espírito Santo to southern Santa Catarina, although some include Serra Geral in the Serra do Mar, in which case this range extends to northeastern Rio Grande do Sul. The main escarpment forms the boundary between the sea-level littoral and the inland plateau (planalto), which has a mean altitude of 500 to 1,300 metres (1,600 to 4,300 ft). The escarpment is part of the Great Escarpment that runs along much of the eastern coast of Brazil south from the city of Salvador, Bahia.

• http://en.wikipedia.org/wiki/Serra do Mar