Discovered in 1992 and quickly became one of the main attractions of the beautiful Chapada Diamantina. Called Blue Well, this cave and crystal blue waters, which sometimes lets in the sun and creates an incredible bright beams, became the largest paleontological site submerged in Brazil, with the discovery of fossils of more than 40 species of pre-historic animals.

The depth varies between 3.5 and 16 meters, but the clean and transparent water allows you to observe the rock formations below in any condition. Within the cave there are hidden remains of animals that have inhabited South America between 10,000 and 2 million years ago. The site was the greatest discovery of recent times in the area of Brazilian paleontology, with more than 3000 identified fossils of more than 40 species. With just giant sloths, they found fossils of four different species.