Glenwood Springs' main attraction, these hot springs pump out 3.5 million gallons of mineral water a day, flowing through two main pools: the 400ft-long big pool at 90°F (32°C) and the 100ft-long small pool at 104°F (40°C). A resort for over 125 years now, it has plenty of other amenities: namely a spa, hotel, water slides and mini-golf.

The full-service spa is one of the nicest in the state, with a suite of offerings – massage tables, tubs to soak in (the guys’ tub comes with a flat-screen TV overhead showing ESPN) and exercise equipment. The pools are located on the other side of the Colorado River from town.