What is Hop-On Hop-Off?

Hop-On-Hop-Off is a type of tourist bus or tram that follows a circular path with defined stops around a city and enables paying passengers to ride indefinitely for a day (or some other length of time) with the right to exit at any point and join another bus or tram to begin their journey.

Bus companies in larger cities offer Hop-On Hop-Off Tours as part of touristic attraction.