The Alcatrazes Archipelago is formed by five bigger islands (Alcatrazes Island, Sapata Island, Paredão Island, Porto Island (aka Farol Island) and Southern island), and some smaller unnamed islands.
It is the farthest island of São Sebastião, being some 30 km (18.6 mi) away from the southern tip of Ilhabela and 35 km (21.7 mi) from the nearest continent beach, Boiçucanga.
Several birds, whales and other sea animals stop there seasonally to reproduce.
The main island was once used by the Brazilian Navy as a howitzer shooting exercise point.
As the shots were harming the environment of the island (either because of the noise, either because of the impacts), the Brazilian Navy quit exercising.
However, the island is still ruled by the military, who forbid fishing, diving and visiting on the island, except for researchers.
The islands are within the Tupinambás Ecological Station.

Two species of frogs (Cycloramphus faustoi and Ololygon alcatraz) and a pitviper species (Bothrops alcatraz) are only found on the Alcatrazes Island.
The Alcatrazes Archipelago is formed by five bigger islands (Alcatrazes Island, Sapata Island, Paredão Island, Porto Island (aka Farol Island) and Southern island), and some smaller unnamed islands. It is the farthest island of São Sebastião, being some 30 km (18.6 mi) away from the southern tip of Ilhabela and 35 km (21.7 mi) from the nearest continent beach, Boiçucanga. Several birds, whales and other sea animals stop there seasonally to reproduce. The main island was once used by the Brazilian Navy as a howitzer shooting exercise point. As the shots were harming the environment of the island (either because of the noise, either because of the impacts), the Brazilian Navy quit exercising. However, the island is still ruled by the military, who forbid fishing, diving and visiting on the island, except for researchers. The islands are within the Tupinambás Ecological Station.
Two species of frogs (Cycloramphus faustoi and Ololygon alcatraz) and a pitviper species (Bothrops alcatraz) are only found on the Alcatrazes Island.
São Sebastião, São Paulo