What: A modest entry at the Vail Four Seasons Resort gives way to a 14,000-square-foot oasis close to Vail Village, with treatment rooms featuring alpine charms like stone fireplaces, two cozy lounges, and a deck. Men's and women's locker rooms have a hot tub and a soaking pool with water pouring over sandstone water features.
The look: Rocky Mountain chic, with wood details and framing, sandstone-slabbed walls, and limestone fireplaces.
Who goes: The real housewives of Sydney, and assorted jet-setters with adrenaline addictions.
The treatment: Dissolve piste-pounding tension with the Vail River Stone massage, using rocks pulled out of the Eagle River, which runs through town.
P.S.: Wind- or sunburned? Try the Mountain Man treatment, an exfoliating scrub, moisturizing mask, and oil-infused scalp rub.