Italy
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.
Listen to the audio guide for Caverna dos Ecos Free on WIP — starts by itself when you arrive, even with the screen off