The Lincoln Memorial: Fittingly, it was from the steps of this beloved memorial that King gave his most famous speech -- "I Have a Dream." Sit on the steps, close your eyes and just imagine the atmosphere there on August 28, 1963, as more than a quarter of million people filled the National Mall to hear what became one of the most important speeches in US history. 2 Lincoln Memorial Cir NW, Washington, DC 20037