Visit Lago Azul Grotto, a natural cave formation in the forest of Mato Grosso do Sul, on this 6-hour tour from Bonito. Following your accredited guide, hike down a short path through the forest, learning about the native plants and animals on the way, to the cave. Descend 650 feet (200 meters) into the earth to see the brilliant blue pool, surrounded by natural limestone formations. Listen to your guide's commentary about the fossils that have been found in the pool, including those belonging to a giant sloth, and the cave's history during a 90-minute tour. Round-trip transportation from select Bonito hotels is included.