Caverna do Diabo, Cave system in Eldorado, Brazil.

Caverna da Tapagem is a cave system in Eldorado containing multiple large chambers adorned with stone columns, mineral drapes, and calcite formations. The network includes underground waterways and different levels that create a complex underground landscape.

Sigismund Ernst Richard Krone first explored and documented the cave in 1886, bringing scientific attention to the site. This discovery prompted geological investigations into the underground river network and rock formations.

The name Devil's Cave became popular around 1964, from indigenous people living near the cave who believed that anyone hit by drops of water from the ceiling would turn to stone. They read the strange formations as people and animals petrified by the constant dripping. Later inhabitants attributed the noises heard at the entrance to groans of lost souls punished by the devil.

The cave is accessed through prepared pathways equipped with stairs and handrails to ensure safe passage. Wear comfortable shoes with good grip, as the ground is uneven and can be damp in places.

The cave's popular name comes from a Tupi-Guarani belief: anyone struck by water dripping from the ceiling would turn to stone, and the formations were seen as petrified people and animals. Later settlers attributed the groans heard at the entrance to souls punished by the devil.