The World Trade Center complex occupies 16 acres in Lower Manhattan and consists of five skyscrapers named by their number, as well as a museum, memorial, transit hub, and mall. One World Trade Center is the tallest building at 104 stories and offers observation floors on the 100th, 101st, and 102nd floors. The complex also includes 4 World Trade Center, 2 World Trade Center, and 7 World Trade Center. The memorial consists of two pools in the footprints of the Twin Towers surrounded by trees and benches.