Travelers are voting National Gallery of Art, Smithsonian Institution and National Portrait Gallery 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 19240 places to visit in the country of United States. Our members favorite in Washington, D.C. is National Gallery of Art and New York City is the top pick in United States. Want more? Check out our map of places to visit in District of Columbia County.