Barra Honda National Park
It represents thousands of years of geological history, which have resulted in an extensive system of independent caverns with formations of stalactites and stalagmites.
It has a network of calcareous caverns, which have been explored by 50% by scientists and speleologists. At present, only the Velvet cavern is open to the public, since it presents adequate conditions for the descent of non-experienced visitors and is ideal for adventure tourism.
It is located in the province of Guanacaste, 22 km northeast of the city of Nicoya. The park is constituted by the Cerro Barra Honda and other neighboring hills.
Barra Honda is the most important cave system discovered so far in the country. Cerro Honda Honda, about 300 meters high, is constituted by reef-like limestones, that is, by ancient reefs that emerged due to over-elevation caused by tectonic faults, developed some 60 million years ago. These reef formations were constituted by blue and green calcareous algae, as well as foraminifera, tiny marine protozoa covered by a calcareous shell, sponges and sea urchins. It is one of the many arcuate calcareous hills that are located in the province of Guanacaste, on both sides of the lower basin of the Tempisque River, and the only one in the area that, according to what has been investigated up to now, has large caverns with a high degree of decor. Another important element of this area is its capacity as an aquifer reserve for the populations that are located around it.