trilhas rj specializes in hiking and spelunking tours, and can be contacted via this online form, or by calling (21) 3437-1056.

cs tur  is one of the companies in rio de janeiro specializing in eco-tourism in rio's caves, publishing more information on the circuito das grutas (complexo espeleológico do archer) and contact forms on this page. 

crux ecoaventuras offers guided tours in several of the caves of the tijuca forest, and can be contacted via this page, via email on this link, or via phone by calling 21 3322.8765 / 3474.1726.