The big bus washington dc open top by night tour washington dc becomes even more beautiful after the sun sets so get involvedon this 2 hour 30 minute fully narrated moonlight tour to discover a whole new perspective on the nations capital see all the popular sights such as the lincoln martin luther king fdr iwo jima vietnam and korean memorials why not combine your visit to the big bus washington dc with other famousattractions and activities inwashington such ascity segw