published by the instituto terra brasil, this page lists a variety of maps for the trails in the parque da tijuca, including caves and waterfalls, divided by sectors.   

published by the instituto terra brasil, an institute dedicated to the preservation of the environment, ecotourism, and education, publishes on this link a map of the caves in the tijuca florest. 

published by the the instituto chico mendes de conservação da biodiversidade, this link opens a high resolution map of the tijuca national park, inclusive of research tools.

the tijuca national park can be seen on this google map, and here on a wikimapia (zoom setting may open correctly only with chrome or firefox).