Washington DC Hop-on Hop-off Bus Tour and Attractions Pass. This hop-on hop-off Washington DC bus tour includes three different loops with live commentary plus a night bus tour and admission to up to five total attractions. Use your 48-hour pass to explore memorials and monuments such as the US Capitol, Vietnam Veterans Memorial and Lincoln Memorial. Choose entry to attractions including the International Spy Museum and the Planetarium at the Smithsonian Air and Space Museum, or select a full-day bike rental. Book Now and Save 15% Off Washington DC Hop-on Hop-off Bus Tour and Attractions Pass.