A geological phenomenon of massive sandstone formations. Called "rock city" by geologists, this ancient geological rock formation covers some 20 acres. Upon entering the many acres of massive rocks, one often feels an eerie sense of being transported through time and space to another era and a different place. You meet with what appears to be a hidden world of mazes, paths and caves leading in all directions, beckoning and inviting you to stay and explore. One 500-ton boulder rests on a smaller one in perfect balance. Special events. 4 miles north of Grampian.