ilha cagarra is part of the arquipélago das cagarras (cagarras' archipelago), which is a group of uninhabited islands located directly south of ipanema beach in rio de janeiro.  

the arquipélago das cagarras is comprised of the ilha cagarra, ilha das palmas, ilha comprida, ilha redonda, and the islets ilhotas da cagarra and ilhota redonda.

ilha cagarra is the most visible island in the chain, measuring 79 meters at its highest point, and it was for this reason that the entire archipelago bears its name.