Gray Line Worldwide

Gray Line Worldwide is a largest provider of sightseeing tours in the planet. Since 1910, Gray Line has grown into the most well-known consumer brand in sightseeing tours.

Licenses

 * Hong Kong: Gray Line Tours of Hong Kong Limited
 * Ireland: The Dualway Group
 * New York City: Coach USA
 * Singapore: Golden Tours (collaborated with Ryde Technologies)
 * Timothy North: The Dualway Group