Canal Quarters-C&O Canal Trust-Lockhouse 21Visit WebsiteGet Directions Details Amenities Details Spend the night in an historic lockhouse along the C&O Canal. Hours See website for hours. Location10700 Swains Lock RdPotomac, MD20854Get DirectionsContact Local Phone: 301-714-2233SocialFacebookTwitterYouTubeMapCapital Region Amenities Number of Rooms4 (sleeps 7)Restaurants and Attractions NearbyArts & CultureGlenstone MuseumLearn MoreDiningOld Angler's InnLearn MoreDiningO'Donnell's MarketLearn MoreDiningCavaLearn MoreAttractionsFalls Road Golf CourseLearn MoreSee More For Capital Region