Brazil, Mato Grosso do Sul, Bonito Stalactites and stalagmites at the Blue Lake Cave (Gruta do Lago Azul). brazil, mato grosso do sul, bonito, stalactites, stalagmites, blue, lake, cave, gruta, do, lago azul | | Brazil, Mato Grosso do Sul, Bonito Cavers explore the Blue Lake Cave (Gruta do Lago Azul). brazil, mato grosso do sul, bonito, cavers, explore, blue, lake, cave, gruta, do, lago, azul | | Brazil, Mato Grosso do Sul, Bonito Cavers explore the Blue Lake Cave (Gruta do Lago Azul). brazil, mato grosso do sul, bonito, cavers, explore, blue, lake, cave, gruta, do, lago, azul | | Brazil, Mato Grosso do Sul, Bonito Cavers explore the Blue Lake Cave (Gruta do Lago Azul). brazil, mato grosso do sul, bonito, cavers, explore, blue, lake, cave, gruta, do, lago, azul | |