The 911 National Memorial is a very worthwhile place to visit, in the original twin towers of Manhattan, designed by Israeli architect Mike Arad, whose designs are named “Reflection Missing,” meaning “Lost.” It consists of two huge sinks and memorials. Nanchi is at the site of the former Twin Towers South Building and Beichi is at the site of the North Building. The square granite pools are constantly flowing from the four walls and rolling waterfalls, symbolizing the endless life. The black marble platform on the four sides of the pool is engraved with the names of 2,997 victims, and the names of the victims in the south building are engraved on the platform of the south pool. The waterfall has lights, yellow lights, it seems to light the waterfall, let the pool burn, people recall the fire of 911. The light can be through the brass carving of the victims' names, let it emit light, but also to the memory of the lost life. More than 400 white oak trees are planted in the spacious square between the two large pools, which symbolizes strong and unyielding American trees. The last picture is the exterior of the memorial, and in order to balance the reconstruction and memorial, the main building of the memorial is underground, and the complex around the memorial is the rebuilt World Trade Center.