Renown for providing outstanding traveler experiences in one of the world’s most popular sightseeing destinations, Gray Line DC is your top choice for safe, reliable, courteous transportation at an affordable price. Founded in 1910, Gray Line has grown into a leader in sightseeing tours. Since 1974, Gray Line DC has been part of the Martz Group, which includes seven major companies that span the East Coast, about 500 employees and 220 coaches. Gray Line DC offers a wide variety of sightseeing tours as well as first-class charter bus service in the Greater Washington, DC, area. We also provide charter service throughout the Mid-Atlantic region.