U.S. national memorial in Washington, D.C.
Source (Wikipedia): Vietnam Veterans Memorial

The Vietnam Veterans Memorial, commonly called the Vietnam Memorial, is a U.S. national memorial in Washington, D.C., honoring service members of the U.S. armed forces who served in the Vietnam War. The two-acre (8,100 m2) site is dominated by two black granite walls engraved with the names of those service members who died or remain missing as a result of their service in Vietnam and South East Asia during the war. The Memorial Wall was designed by American architect Maya Lin and is an example of minimalist architecture. The Wall, completed in 1982, has since been supplemented with the statue Three Soldiers in 1984 and the Vietnam Women’s Memorial in 1993.