|Photo by Marcio Cabral|
Anhumas Abyss is a cave 23km far from the city of Bonito in the state of Mato Grosso do Sul, Brazil. Access is made by a gap that exists in the rock by means of vertical rappelling techniques. To the base of the cave there is a 72-meter drop, until the deck by the lake of clear water. Depth can reach 80m. During some days of the year the sun passes through the small opening of the cave, producing a light beam that illuminates the cave for a few hours.
All details and photos to this adventure can be found here (in Portuguese).
Do you know the difference between cave and cavern diving? Check it out here.