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 NearbyDiningOld Angler's InnLearn MoreAttractionsPotomac PaddlesportsLearn MoreDiningCavaLearn MoreArts & CultureGlenstone MuseumLearn MoreAttractionsCarderock Recreation AreaLearn MoreSee More For Capital Region