It is a truly spectacular trail and also one of the scariest in the U.S. A Native American legend has it that where the trail passes by Grouse Lake, hikers can hear the cries of a young boy who drowned long ago. And perhaps the theme park will close early enough so that visitors won’t hear the chilling screams that several security guards have heard emanate from the 10 Courts of Hells display over the years. A growling ghost nicknamed Grumpy lurks in a room underneath a set of stairs, and the spirit of John Henry, who died in the boiler room, still lingers there.