Entering the Aromatherapy Crystal Steam Room in the spa at the Beverly Wilshire Hotel, available to hotel guests and spa customers, is like being transported into a trippy parallel universe. The dark ceiling is covered with teeny, color-changing fiber-optic lights. Bum feel extra warm and cozy? That's because the walls and benches are heated. That delicious scent in the steamy air is eucalyptus. The velvety black room's focal point is a huge, white quartz crystal, lit from below, which is purported to give off "positive energy," to relieve stress and help heal the immune system. Whatever, it's supercool to stare at through the sauna mist and contemplate the mysteries of the universe. Just outside the sauna is an ice fountain filled with crushed ice, which you're supposed to rub on your freshly steamed skin to really get the circulation humming. Finally, step around the corner to the rainfall shower with three settings: Caribbean Rain, Atlantic Storm and Cold Mist. It's better than Superman's Fortress of Solitude. 9500 Wilshire Blvd., Beverly Hills. (310) 385-3917, fourseasons.com/beverlywilshire.

—Samantha Bonar