Barra Honda is home to a cave system that is made up of reef-like limestones. Ancient reefs that emerged due to over elevation that was caused by the tectonic faults. It developed 60 million years ago. This cave represents thousands of years of geological history, which has resulted in an extensive system of independent caverns with formations of stalactites and stalagmites. It has a network of calcareous cavers, which have been explored 50% by scientists and speleologists. At present, only the Velvet cavern is open to the public because it is safe for non-experienced visitors and is an ideal location for adventure tourism. You will hike through beautiful forests then when you get to the cave you will be put in safety equipment and begin the descent down a ladder into the cave. Then you will explore for about an hour, seeing formations that were made millions of years ago. People with conditions such as hypertension, vertigo, or claustrophobia are not recommended to descend to the caverns.