in the island's surroundings to the south there is the 'campo de provas da marambaia', or 'marambaia fire range', where the brazilian marines perform their training and equipment testing.

five kilometers to the southeast, after the reserva biológica e arqueológica de guaratiba (biological reserve of guaratiba), is the barra de guaratiba neighborhood - to the north, beyond the open waters of sepetiba bay, is pedra guaratiba, another famous neighborhood.

this link shows ilha do cavado  on a wikimapia - the link as we present it is best seen using google chrome, as it might not open correctly with other browsers.