7. 3 World Trade Center
3 World Trade Center, designed by Pritzker Prize-winning architect Richard Rogers, is the second tallest building on the World Trade Center site, and the fifth tallest in New York City. Developed by Silverstein Properties, this 2.5 million-square-foot, 1,079-foot tall tower is the latest and most advanced in a series of high-tech, sustainable and high-profile buildings to rise in Lower Manhattan. 3 World Trade Center is a model of transparency and sustainability. The tower consists of a reinforced concrete core with steel structure outside the core, and it is clad in an external structural steel frame. The building features floor to ceiling glass; all four corners, and each floor plate, of the tower are column-free to create an open workspace environment–key for cutting-edge companies in brainpower-driven businesses like technology, advertising and branding, as well as law and financial service firms. 3 World Trade Center is a LEED-certified Gold office tower.