Blue Lake Cave
Bonito, Brazil · built 2001
Gruta do Lago Azul Natural Monument (Blue Lake Cave) is a natural monument in Bonito, Mato Grosso do Sul, Brazil. It holds two caves with interesting but fragile calcareous formations, and has been listed as a protected area since 1978.
NatureReserve data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).