This neoclassical temple, with its commanding statue of Abraham Lincoln, is one of the most frequently visited and most inspirational sites in Washington. Martin Luther King Jr. delivered his "I Have a Dream" speech on its steps—it's practically impossible not to feel a sense of history when you think of all those people gathered around the Reflecting Pool in 1963. Especially dramatic when seen at night. Park rangers offer interpretive tours upon request 9:30 am-11:30 pm, except Christmas Day. Accessible 24 hours a day. 23rd Street Northwest (at the west end of the Mall; Metro: Foggy Bottom or Smithsonian, each a 20- to 25-minute stroll), Washington, D.C. Phone 202-426-6841. http://www.nps.gov/linc.