ilha rasa is located near the cagarras islands and the entrance to guanabara bay in rio de janeiro.  

while some consider it part of the cagarra islands as a natural monument, officially it is not - we included the island in this group as a reference to its geographical position.

it is the only inhabited island in the area, and furthermore conspicuous because of the lighthouse situated on it, which despite nearly 200 years of age still operates today.