City Sightseeing Worldwide is seen as one of Big Bus Tours's top competitors. City Sightseeing Worldwide is headquartered in Warwickshire, England, and was founded in 1999. Like Big Bus Tours, City Sightseeing Worldwide also operates in the Packaged Vacations, & Tour Operators field. City Sightseeing Worldwide generates 4.49% the revenue of Big Bus Tours.