Caverna dos Ecos

Caverna dos Ecos, one of the Most Spectacular Caves in Brazil, is a mica schist cavern in central Goiás, Brazil, also known as "Gruta dos Ecos" (English: Echo Cave). It is located 134 kilometers from Goiânia, between Cocalzinho de Goiás and Braslia. It is located near the Girassol community, just after the Federal District's border. It is 1,380 meters long and descends 142 meters deep.

It was discovered in March 1975. At a height of 1050 meters, the entrance is placed. It houses Lago dos Ecos, South America's largest subterranean lake, which is roughly 300 meters long, 50 meters broad, and between 10 and 15 meters deep, making it one of the world's longest lakes. Caverna dos Ecos is a unique subterranean karstic feature because no other Brazilian cave of comparable size is known from similar lithologies, mica schist, quartzite, and marble, with schists and quartzite accounting for 70% of the cave's volume.

This cave, a geological wonder, was formed in limestone but traveled to mica-schists underlying it due to disintegration. Only an experienced guide is permitted to accompany visitors. Mica and schist make up the rock, which explains why there are no speleothems.

Location: between Cocalzinho de Goiás and Brasília