Travelers are voting National Gallery of Art, National Portrait Gallery and Smithsonian American Art Museum as the best of 9 places to visit in District of Columbia County. You can find 25 places to visit in Washington, D.C. and 18411 places to visit in the country of United States. Our members favorite in Washington, D.C. is National Gallery of Art and Las Vegas is the top pick in United States. Want more? Check out our map of places to visit in District of Columbia County.