Praia do Abricó is Rio’s only nudist beach. It attracts a mixed crowd. You’ll see plenty of buff gay Brazilian men in the buff. It can be found in the Grumari district.
It can be a little tricky to get to. There are no public transport links but you’ll be able to get there if you hired a car. You can get the bus to Recreio shopping mall and take an Uber from there.