|Location:||On the Anhumas farm. 260km from Campo Grande, 21km from the village Bonito.|
|Address:||Gruta do Lago Azul|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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|1924||discovered by the Terena Indians.|
|1992||Brasilian and Fench divers discovered 10,000 years old animal bones.|
As the name tells, the most interesting feature Gruta do Lago Azul is the blue lake it is named after. Every morning, between half past seven and half past nine the sun shines through a hole in the ceiling and the lake gets its typical blue shimmer. The blue colour fills the whole chamber and gives the speleothems a magic touch. The undisturbed surface of the lake mirrors the stalactites, and thus doubles the beauty of the cave.
But the lake is also a prehistoric site. Divers discovered 10,000 years old bones of animals on its gound.
The whole area around Bonito is karstified with numerous caves, karst springs and dolines.