one of the most popular caves in the city, is the enchanting gruta do morcego, which is translated as 'bat cave'. ideally located, in the exotic tijuca forest, the gruta do morcego cave is recognized as the second largest gneiss cave in brazil, with a huge hollow space hiding behind the small opening in the rock face.

due to its size, and its rich abundance of wildlife, such as insects, arachnids, and mollusks, the gruta do morcego is often visited by students, interested in geology and geography.