The memorial, located on the grounds of the Pentagon, honors the 184 lives lost in the headquarters for the Department of Defense and on American Airlines Flight 77 during the terrorist attacks on September 11, 2001. The Memorial includes a park and gateway spanning approximately two acres. The age and location of each victim are inscribed on individual steel benches inlaid with granite, which are lit by a pool of water underneath. Crape Myrtle trees have been planted around the memorial and will eventually grow to 30-feet high to provide shade. On the western edge of the memorial the Age Wall representing the range of ages of the victims from 3 to 71 years old., The Jefferson Memorial, the Lincoln Memorial, the Washington Monument – let’s face it, Washington, DC’s famous monuments and memorials are why you’re here. Explore the National Mall and plan your trip to the nation’s capital today., There are dozens of monuments and memorials onsite including the Coast Guard Memorial, the Space Shuttle Challenger Memorial, the Spanish-American War Memorial, and the USS Maine Memorial. Major attractions include the Tomb of the Unknowns and the former home of Robert E. Lee..