If Terra Ronca is the cathedral of underground Brazil, Mambaí is the secret chapel — caves smaller in scale, but with experiences its famous neighbor does not have: rappelling down through a skylight, crossing 1.7 km of dark gallery and coming out the other side of the mountain blinking at the sun. The town guide is in Mambaí: the cerrado’s secret; this is the dive underground.
Lapa das Dores: the skylight
The cave roof collapsed millennia ago and left a window through which the sun enters as a column of light — the kind of scene that looks like a render. You can go in by trail or, for the brave, drop the 25 m rappel straight through the skylight, landing in the beam of light (around R$ 75 with equipment and guides). Photography: arrive between 10am and 1pm, when the sun is overhead and the column of light turns solid.
Lapa do Penhasco: the crossing
The largest cave in the region is a 1.7 km tunnel you cross end to end: chambers with speleothems, low-ceilinged stretches and the absolute silence known only to those who have switched off a flashlight inside a cave (your guide will propose the “minute of darkness” — accept). It calls for average fitness and no severe claustrophobia.
The perfect combination with the water
The golden rule of the Mambaí itinerary: cave in the morning, waterfall in the afternoon. Underground tires you more than it seems, and the Poços Azuis or the Cachoeira do Funil are the ideal reward. In two days you do the two great caves + two waterfalls; in three, you add the canyon zip line and go home with the complete cerrado: above, below and flying.
Before you go down
- A community guide is compulsory at all of them — book through the local association or your guesthouse.
- Heavy rain = closed cave (the river rises). Safe season: April to October.
- The right backpack: our complete caving checklist applies here item by item — including the second flashlight.
- Want MORE cave? Terra Ronca is around 100 km away — the underground double act of Goiás.
🥾 Who is it for?
Effort: moderate to intense — caves with rivers, uneven floors and stretches of total darkness, always with a guide. Children: from ages 10-12 if adventurous. Seniors and reduced mobility: not recommended inside; the entrances and outer sinkholes deliver the photograph and the thrill without the risks.
