- Georgetown BID
America’s story lives here! Now celebrating its bicentennial, one of America's best preserved neoclassical estates. Built in Georgetown in 1816 by Martha Washington’s granddaughter and lived in by five generations that followed, from the agricultural to the digital age. Their collections, household items, landscape, and stories reveal two centuries of American arts, labor, politics, and technology. Tour the 5½-acre garden (just $3), view the 1919 Pierce Arrow motor car and the District’s oldest exhibited smoke house, and see the Thornton-designed mansion by guided tour, offered hourly, Tuesday through Sunday.