Caverna dos Ecos
Caverna dos Ecos (GO-018), also called "Gruta dos Ecos" (English: Echo Cave), is a mica schist cavern in central Goiás, Brazil. It is located between Cocalzinho de Goiás and Brasília, 134 km from Goiânia. It is near the settlement of Girassol, just after the boundary with the Federal District.
Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).