Martz Group-Gold Line Gray Line DCVisit WebsiteGet Directions Details Amenities Details Gray Line is Washington, D.C.'s premier sightseeing & charter coach company. We provide a wide array of specialized sightseeing tours. Hours See website for hours. Location5500 Tuxedo RdHyattsville, MD20781Get DirectionsContact Local Phone: 301-386-8300 US Toll Free: 240-426-5381EmailSocialFacebookTwitterMapCapital Region Amenities Group Tour Rates OfferedGuided Tours/Guide AvailableMember of American Bus AssociationNumber of Buses70Number of Motorcoaches70Receptive Tour ServicesStudent Group-FriendlyPlaces NearbyAccommodationsWoodspring Suites-Hyattsville/Washington DC EastLearn MoreAttractions, Accommodations, & DiningBest Western-Capital BeltwayLearn MoreAttractions, Accommodations, & DiningCountry Inn & Suites-Capitol HeightsLearn MoreAttractions, Accommodations, & DiningCourtyard by Marriott-New CarrolltonLearn MoreAccommodationsDoubleTree by Hilton Hotel Largo-Washington, DCLearn MoreSee More For Capital Region