Thousands of years ago, a landslide caused its division into two parts.

It has two skylights, one of them called Araras and a large gallery called Lovers' Hall decorated with rich stalactites and stalagmites and huge sand dunes crossed by the underground Lapa river.

It was formed by the continuous action of rain water and the Lapa River that comes down from the Serra Geral.

Its name comes from the roaring sound produced by this river running through its 5.8 kilometres (3.6 mi) long route the two craters on the surface arisen from seismic activity millions of years ago, many halls of stalactites and stalagmites of impressive dimensions of up to 150,000 square metres (1,600,000 sq ft) and columns with more than 590 meters high.

[4] The Salão dos Namorados (English: Lovers Hall), besides the ceiling of the cave shaped in the form of a clock, the Oco das Araras, a fantastic place where many parrots live, and Clarabóia, another output of Terra Ronca for those who do not want to stay longer inside the cave are other highlights found here.