Barra Honda National Park
Barra Honda is Costa Ricas only subterranean park. Its myriad caverns are carved out of the soft limestone of ancient coral reefs forced upward by tectonic faults. Erosion and rain took over from there, shaping small subterranean chambers and caves over a period of 70 million years.
Costa Rica Gulf Of Nicoya Costa Rica General Cerro Barra Honda Barra Honda Barra Honda National Park
Source: costarica.com