Just a short subway ride from the National Mall and the Smithsonian, the Hilton Arlington (Va.) sits above the Ballston Metro Station and is linked by skywalks to the National Science Foundation and Ballston Common Mall's restaurants, movie theater and stores. Metro trains provide quick access to nearby historic sites, Georgetown and Old Town Alexandria. Guests are within five miles of Reagan National Airport, the Kennedy Center for the Performing Arts, the White House, various museums and the U.S...