At Colorado’s Iron Mountain Hot Springs, a therapeutic, natural springs, set amid mountains in Glenwood Springs, near Aspen, I’m soaking in an infinity-edged, pool called Garnet, which overlooks the Colorado River. Suffused…

At Colorado’s Iron Mountain Hot Springs, a therapeutic, natural springs, set amid mountains in Glenwood Springs, near Aspen, I’m soaking in an infinity-edged, pool called Garnet, which overlooks the Colorado River. Suffused…