|Courtesy Park Hyatt|
This hotel used sleek design to raise the bar for Colorado ski spas when it enlarged its Allegria spa from 17,000 to 30,000 square feet last year. Twenty-three-foot-high ceilings give the entrance hall the feel of a stage set, and large, well-proportioned windows allow natural light to pour into the treatment rooms, a rarity in most ski spas. The materials — maple and walnut, wrought iron, and glass panels etched with an aspen-tree motif — are mountain-sensuous. (Right, the inviting relaxation room.) The main attraction is the 2,600-square-foot Aqua Sanitas ("Healing Waters"), a classic hydrotherapy sequence, from caldarium (hot room with a soaking pool) to tepidarium, a Pompeian womb with heated tiled chaises. You could easily spend half a day in this spa, and indeed, room service is kept busy delivering lunches here. — E.P.
800-223-1234, Park Hyatt Beaver Creek