The hot springs at Glenwood Springs, Colorado, feature one of the world's largest hot springs pools, set in a canyon between the Colorado River and the Rocky Mountains. The main pool runs around 40°C, with a separate therapy pool at about 38°C, and the combined pool area is larger than a football field. Nearby, the Yampah Spa Vapor Caves offer a natural steam sauna experience inside underground caves. The area has long been regarded as a sacred healing site by the Ute people.