Stretching for approximately six thousand meters, this is the largest cave in the state of São Paulo. Millions of years old, its incredible rock formations, including stalactites and stalagmites, were formed by dripping water. Its wide galleries, winding corridors, and lofty chambers evoke the grandeur of a natural cathedral. Thanks to artificial lighting and internal walkways, the cave is easy to access. Its intriguing name comes from local legends of mysterious sounds coming from the cave, a story that continues to captivate visitors to the Vale do Ribeira river valley.