Historical Tours in Washington DC  / Smithsonian National Museum of Natural History / National Museum of African American History and Culture/ U.S. Capitol / National Gallery of Art / United States Holocaust Memorial Museum / Library of Congress / National Air and Space Museum / Vietnam Veterans Memorial / Arlington National Cemetery Guided Walking Tour with Changing of the Guards / Mount Vernon and Old Town Alexandria Day Trip from Washington DC / Skip-the-line National Archives Building Guided Tour - 8ppl Max / Historic Georgetown / Private Capitol Hill / Supreme Court / Library of Congress Tour / National Cathedral /