Colorado can't get enough of its warm-water mountain retreats, and last year Glenwood Springs was graced with a new, unique getaway: Iron Mountain Hot Springs. This sixteen-pool oasis gives soakers a spectrum of multi-temperature relaxing options, with naturally heated waters ranging from 99 to 108 degrees. Cool off with a swim in the large freshwater pool, or continue the tranquil journey in the bubbling whirlpool. A trip to this geothermal wonder can easily be an all-day affair, with the on-site Sopris Cafe offering sandwiches, pizza and frozen yogurt along with a full-service bar (you can have drinks delivered to a pool) and plenty of patio seating so you never have to leave. Whether it's the middle of winter or a warm summer evening, Iron Mountain Hot Springs is a mini-resort made for unwinding year-round.