Sightseeing Bus

A tour bus service is a bus service that takes visitors sightseeing, with routes around tourist attractions. ... Double-decker buses and open top buses are commonly used, for providing a good view. Large coaches are used internationally by tour operators, intercity bus lines and charters, for short and long distance destinations. These buses are larger than regular transit buses with 2 to 4 axles (6 to 10 wheels). [Tour bus service. Wikipedia]