The Rocas Atoll is located in the Atlantic ocean. He belongs to the Brazilian state of Rio Grande do Norte. Is Atoll 200 km from Natal. The opening of the Roku due to the shipwreck in 1503.

ATOL das Rocas reserves is of volcanic origin and was formed partly because of the corals. Rokas is the only Atoll in the South Atlantic, and the smallest in the world. The shape of the Atoll like an oval. Its length is about 3 and 7 km, width - 2, 5 km Depth of the lagoon is six meters, an area of about 7 km

The highest point of the Roku is the southern sand dune, its height is about 6 m. the Atoll consists of a huge number of red algae and corals. The coral ring is almost closed, the exception is only one Strait with a width of 200 meters.

Small Islands of the Atoll is covered with a variety of grass, shrubs and palms. On the Islands Roku live different kinds of spiders, crabs, Scorpions and birds. In the waters surrounding Rokas home to sharks, turtles and dolphins.

In 1960, on one of the Islands was erected lighthouse Navy of Brazil. In 2001, UNESCO took the Atoll under his patronage, as a world heritage site. And now the Rocas Atoll is a conservation area. Its Islands remain largely untouched due to its remoteness. Now it is used for scientific research.