Poço Azul is a must for those visiting Chapada Diamantina. A crystal water-filled cave where it is possible to see the rocky bottom, even at 16m deep.
The Poço Azul (Blue Well) at Chapada Diamantina is one of those places that appear to be from another planet. The water is so transparent that people seem to float. I had lucky to get there exactly in the moment which a beam of the sunlight illuminated the well, leaving him even bluer.