EntityQ5181674· pop 6· linked from 16 articlesCraighead CavernsSign in to saveextensive cave system located in Sweetwater, TennesseeWikidata factsInstance ofshow caveCountryUnited StatesLocated inTennesseeOfficial websitewww.thelostsea.comImageThe Lost Sea (6931688408).jpgShow 1 more factP1435National Natural Landmarkvia Wikidata · CC0On the mapConnectionsUnited StatesCountryNamibiaCountryCategoriesCaves of TennesseeEast TennesseeLandforms of Monroe County, TennesseeNational Natural Landmarks in TennesseeShow caves in the United StatesTourist attractions in Monroe County, TennesseeUnderground lakes