The National September 11 Memorial at the site of the World Trade Center in Lower Manhattan, New York (© Jon Hicks/Corbis)

【September 11 2014】The National September 11 Memorial marks the site where once stood the giant towers of the World Trade Center. After terrorist attacks toppled those towers 11 years ago today, the rubble was cleared away and this memorial was created as a reminder of all that was lost. The memorial's architect, Michael Arad, explained that his design, which he calls "Reflecting Absence," was intended to "...make visible and present what is no longer here."Explore breathtaking Gallery from the HuluTrip homepage over the past 5 years..