The Rio Camuy Caves are a cave system located in Western Puerto Rico. The cave system itself is located on the largest sinkhole in the world! The cave itself is inaccesible, because of the sinkhole at the bottom. However, there is a stairway that allows tourists to go to the entrance, and leads to an overlook of the sinkhole. The sinkhole itself is dark, so you need a good flashlight to see it. There are some other caves in the area which are accesible. The cave is self guided, but some of the other caves in the area are guided.