You can’t go to Rio without visiting the Christ! Despite it is a bit expensive (~60 Reais) it’s worth it. 10min in the Bondinho until the top and some stairs to climb to finally arrive in the middle of a big crowd lol. But you can still find a little place to fit in and take a picture of the beautiful view. Also note that Rio has other belvederes not very known like o Mirante da Dona Marta and a Vista Chinesa.
A vista Chinesa: