City Sightseeing Budapest Hop-On Hop-Off Tour With Optional Boat Ride. Explore Budapest with a hop-on hop-off bus tour, and see the city’s top sights at your own pace. A convenient way to discover the Hungarian capital, your ticket offers unlimited travel for 48 hours. Hop on and off at any of the 27 well-placed stops around the city to see showstopper attractions such as the Hungarian Parliament Building, Heroes’ Square and the UNESCO-listed Buda Castle District. Upgrade to include a daytime or evening cruise for an up-close look at the UNESCO-listed Banks of the Danube River. Book now and Save 10% Off City Sightseeing Budapest Hop-On Hop-Off Tour With Optional Boat Ride.