Urban Spine is a mix-use supertall development above the 7 Train station in New York City, integrating condos, serviced apartments, and offices. Celebrating the "great underground," the subway entrance is placed at the center, offering natural light and 24/7 public access. Unlike traditional vertical stacking of mix-use tower, a horizontal split forms two towers, creating shared public spaces with amenities like restaurants, co-working areas, and gyms for constant interaction. The design optimizes energy loads by combining office and residential programs, reducing grid pressure.