Timpanogos Cave & American Fork Canyon: Subterranean Wonders and Travertine Springs
Timpanogos Cave National Monument sits 1,065 feet above American Fork Canyon on a granite slab approached by one of the steepest maintained trails in the National Park system, and the three connected caverns at the top contain some of the most unusual cave formations in North America — helictites that grow in every direction regardless of gravity, massive stalactites, and formations that have been developing for more than 9,000 years in the mountain's limestone heart. The canyon also contains Cascade Springs, a set of crystal-clear travertine terraces where groundwater emerges from the bedrock at a constant temperature and flows over limestone shelves in a 2-mile boardwalk circuit.