Many of the United States' most famous landmarks are situated in and around the National Mall in Washington, D.C. The east-west endpoints of the park—the Lincoln Memorial and the Capitol—are only 2 miles apart, but there's enough paths to extend your route as long as you want. In one run, you can see the Capitol, the White House, the Washington Monument, the Lincoln Memorial, the Reflecting Pool, the Vietnam Memorial, the Smithsonian and much more. You could even stretch it out, going south around the Tidal Basin and getting a peek at the Jefferson Memorial.