Gruta Casa de Pedra

Gruta Casa de Pedra (SP-009) is a cave located in the karstic region of the Alto Ribeira Tourist State Park, between the municipalities of Apiaí and Iporanga, to the south of the State of Sao Paulo, Brazil.

[2] It is located in the final portion of the hydrographic sub-basin of the Maximiano stream which enters the cave for about 800 meters and flows into the Iporanga River.

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.

[3] 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.