It’s Free to Look: 530 East 76th Street

This airy Upper East Side apartment is better than a trip to the spa.

The home of Tracy Stern, the owner of enviro-chic TSalon, the 3,300-square-foot condo offers plenty of ways to soak up that Vitamin D, with a five-windowed sitting room, sun-filled kitchen and three balconies.

This ultra-modern design is not for the neighborhood's afternoon tea crowd. With plastic furniture, decorative sheer curtains and kids' rooms without a single pink cushion, there's not a hint of stodgy about this three-bedroom, listed by Douglas Elliman.

Meditate on a balcony with a view of the East River from the 28^th floor. Or stir from sun-drenched stupor and sweat through a fitness class in the building, then go for a swim on the rooftop gym. At nearly $3.5 million, this may be out of reach for most granola-crunchers. But perhaps if you ask nicely, you can at least stop by for some organic tea. — Laura Kusisto