Smart Destinations cuts an extra 5% off a Smart Destinations Washington D.C. 3-Attraction Explorer Pass when you sign up for emails, as provided by Dunhill Travel. (The discount will be taken automatically in cart.) With prices starting from $56.05 after the discount, that's a savings of $3 and the lowest price we could find. Choose from 10 attractions including the CitySights Monuments Hop-On Hop-Off Tour Bus, National Geographic Museum, George Washington's Mount Vernon, the Capital Wheel, and more. Book this travel deal by April 25.