Founded in 1916, Gray Line Tours Tucson offers a range of charter transportation services for schools, churches, associations and hotel groups. It is one of the leading transportation and tour companies in Arizona. The company features various local tours, such as Old Pueblo, Best of the Barrio cuisine and Tombstone: Memories of the Old West. Gray Line Tours Tucson also organizes tours to national parks and casinos in the Southwest. It maintains a fleet of vans and school and passenger buses. The company provides several group and individual tour packages. Gray Line Tours Tucson works in collaboration with the University of Arizona and the Metropolitan Tucson Convention & Visitors Bureau.