Recommendation via Submit Recommendation:

Buraco das Andorinhas in Formosa, Goiás is a natural wonder that boasts a massive circular depression formed by the dissolution of rocks, measuring 167 meters in diameter and 148 meters deep. The cave has an entrance through a collapse doline (a circular depression formed by the dissolution of rocks), and it is believed to be around 60 million years old.

The location is situated in the municipality of Formosa, near the district of Bezera. It is approximately 117 km from Brasília - DF, including 17 km of dirt road in good condition, and 47 km in total from the city of Formosa. Driving time from Brasilia is approximately 2 hours in good driving conditions.

Once inside, visitors can explore the dense forest of endemic vegetation, where giant ferns and an immense hall await them. A striking underground lagoon of blue water, one of the largest accessible underground lakes in Brazil, also features in the cave. The lagoon, 180 meters long, surprises visitors with its beauty, and it is formed by the water table, which doesn't change its colour in the rainy season since it's not reached by it.

Visitors are advised to wear comfortable clothing and sturdy shoes as the cave is rocky and can be slippery, especially during or after rainfall. Please be aware that it is not the easiest if climbs down or up. Cameras are a must-have as the site provides numerous opportunities for breath-taking photographs. With its unique features and impressive natural beauty, Buraco das Andorinhas in Formosa, Goiás, is a must-visit for anyone who loves to explore the wonders of nature.

You can enter the area directly for R$25 or do a guided and well managed tour. I have used Itakama and I found them very professional and friendly. Please note that you must be at the meeting point at 8:00 sharp. If you are not there on time, they will leave without you.