It's a calcareous rock cave in Iraquara municipality, Bahia State, Brazil. This one if formed by the same underground waters emerging at Pratinha´s cave. Entering the cave's mouth, sun rays hit the interior lake, creating a gorgeous visual spectacle, with blue tones being given by the minerals present in the water, mainly magnesium. You have to take a guide and pay a R$ 5 fee to enter the area. The Pratinha Farm (Fazenda Pratinha) runs both caves. It´s located 9km (in a non-paved road) away from highway BA-432. You can contact people in charge at telephone and fax number +(75) 229-4115, talk to Raimundo or Junior Solon. You can write them using postal code CEP 46.980-000 Brazil. There are lunch facilities as well as renting of diving equipment (only for the outside lake, since it´s prohibited to swim in the interior one).