National Mall
Protests and rallies also happen at the National Mall.  One of the most famous was the March on Washington for Jobs and Freedom in 1963, where Martin Luther King, Jr. gave his I Have a Dream speech.  A rally in 1969 to end the Vietnam War was the biggest protest on the Mall.  Over 2 million people came and marched to the White House.  In 1995, the Million Man March was held on the Mall.