The 9/11 Memorial is located at the site of the former World Trade Center complex and occupies approximately half of the 16-acre site. The Memorial’s twin reflecting pools are each nearly an acre in size and feature the largest man-made waterfalls in North America. You can explore the memorial through an audio guide app that features a 40-minute tour about the events of 9/11, the victims of the attacks, and the design of the Memorial.