In accordance with measurements performed from the 1960s, but contrary to the allegation that the actual size of the entrance of the cave is 215 meters high, Gruta Casa de Pedra is part of a technical survey containing further details on the Ribeira valley cave system which will be published as soon as data from other Brazilian caves are finalized. With two entrance points, Santo Antonio, located within the nucleus Casa de Pedra which does not present risk for the tourists, and the other through the nucleus Caboclos. The first leads to the Krone Wall, which measures about 220 meters high, and then on to the Krone Hall, a huge gallery which presents some features of incrusted limestones, such as foliation, and a set of foldings of tectonic origin. Nearby, along the limestone wall where the mouth of the cave is located, there is a rocky shelter of reduced dimensions called Maximiano, which was excavated by
Guy Christian Collet in the 1970s. Together with the Santo Antonio entrance they form a set of rare beauty along with roughage underground river waterfalls in addition to swimming trails along the route which leads to the end of one of the already mapped areas where part of the roof of the gallery collapsed. ==See also==