following, we grouped rio's waterfalls as most popular, by area, and by river, however a good hiking guide will suggest the most appropriate excursion depending on individual requirements.  

published by the instituto municipal de urbanismo pereira passos, with the prefecture of the city of rio de janeiro, only downloadable in a zip file, this excellent map shows the foresta da tijuca in great details - including trails, rivers, points of interest, waterfalls, mirantes, caves, and dangerous areas to avoid.

of particular interest are the waterfallslisted on the map numerically as (5) cascatinha taunay, (6) Cascata do Tanque, (18) Cachoeira das Almas,  (44) Cascata Diamantina, (58) Cascata Gabriela, (93) Cascata da Caveira, (97) Cascata do Assento ou Cascata Grande, (98) Cascata dos Ciganos, (99) Cascata do Ramalho.