Terra Ronca State Park, State park with cave network in São Domingos, Goiás, Brazil

Terra Ronca State Park is a 57,018-hectare protected area in São Domingos, northeastern Goiás, on the border with Bahia. It safeguards a karst complex of numerous caves with speleothems, springs and rivers that flow inside and outside the caves, including Seu Ramiro cave, which has Brazil's largest natural cave entrance.

The Brazilian government established this protected area in 1989 to preserve the karst landscapes and natural features of the São Domingos region. This recognition acknowledged the geological and ecological importance of the cave systems and underground ecosystems.

The park lies in the municipality of São Domingos, on the border with Bahia. Its name comes from the Terra Ronca cave, whose name refers to the sound of the water that runs through it. The cave known as Seu Ramiro is named after a local resident and has the largest natural cave entrance in Brazil.

You must register at the park entrance and hire a certified guide to explore the cave systems safely, as conditions change with the seasons. Bring waterproof gear and prepare for uneven ground and underground passages with varying temperatures.

The area contains Seu Ramiro cave, which features the largest natural cave entrance in Brazil alongside intricate underground waterways. This massive opening is visible from a distance and marks a remarkable geological landmark within the region.