One of the sleekest residential towers to open in 2007, ThreeTen is a condominium with 88 apartments on 31 floors.

This soaring blue glass tower has a five-story limestone base and offers four different kinds of residences, many with multiple terraces and luxury amenities including a private garden courtyard.

Two duplex townhouses, located in the base, are designed to emulate the exclusivity of classic Upper East Side or Sutton Place maisonettes, except they are accessible from the main elevators and they include all the building's services. Designed on a grand scale, they are 40-feet wide and have double height great rooms, fireplaces, floor-to-ceiling windows, 20-foot galleries (perfect for the art collector), and enormous private rooftop terraces. The full-floor penthouse has three terraces (including two apartment-sized ones and a smaller one off the kitchen for outdoor dining), a breakfast room, and spectacular views—and the view is protected because the developer bought the air rights. The lower floor duplex lofts, have great rooms with double height ceilings, two-story walls of windows and huge master bedrooms.

The tower residences on floors eight-30 feature large galleries and one or two terraces each. One line of the tower residences has a 46-foot long combined living and dining room with terraces at each end.

All apartments have walk-in closets and white-oak hardwood floors. Kitchens feature pale celadon glass-fronted cabinets, Thermador ovens, Gaggenau cooktops, Sub-Zero refrigerators, and Carrara marble countertops and backsplash. Gioia Venetino marble bathrooms feature six-foot bathtubs, double sinks and frameless glass showers.

Amenities include a 24-hour doorman, concierge, private fitness center, valet parking and a private Zen garden.