A slim sheet of water descends 162 feet down this limestone sinkhole. Only 40 feet in diameter at the top, the floor of the sinkhole widens to at least 80 feet across. In spring and summer the walls of the cavity are covered in moss making it seem like a portal to another dimension. Getting to this wondrous natural phenomenon isn't easy - it's about an hour-long round trip hike. Wear good shoes and bring bug spray! Permits are needed both to view the sinkhole from the top and another to rappel down. Only experienced rappelers can go down the sinkhole.