Expensive, thrill-seeking observation decks are becoming the new norm for big-name skyscrapers. New York City just got a breathtaking new view. Skylift at Top of the Rock is now open, giving visitors a 360-degree view of the city nearly 900 feet in the air. Visitors step into an open-top, revolving platform that’s encased with walls of plexiglass on the building’s 70th floor.