江苏旅游资源丰富，自然景观与人文景观相互交融，有古镇水乡，有千年名刹，有古典园林，有湖光山色，有帝王陵寝，有都城遗址，可谓是“吴韵汉风，各擅所长”。
XuanwuLakewasconnectedwiththeYangtzeRiverinancienttimes.IntheSixDynasties,alongdikewasbuiltonthenorthsideofthelake.Duetothecontinuousimpactoftheriver,itwasisolatedfromtheYangtzeRiverandformedanindependentlake.Onthisday,XuanwuLakestilldependsonthewaterfromtheYangtzeRiver.
XuanwuLakeisatectoniclakeformedbyYanshanorogeny.ItwasnamedSangpoLakeinancienttimes.Later,itwascalled"Houhu"becauseitwaslocatedintheshadeofZhongshanMountain.AfterthecapitaloftheeasternWuDynastywasmovedtoJiankang,therewasapalaceonthesideofHouhu,andthewaterfromHouhuwaspouredintothepalace.BecausethelakewasinthenorthofTaicheng,itwascalled"Beihu".Inhistory,itissaidthatinthelastyearsofWuDynasty,themotherofXuansai,anofficialofDanyangCounty,wasswimminginHouhulakeattheageof80.Shesuddenlyturnedintoaturtleanddiedforathousandyears.Therefore,peoplealsocallHouhuLake"Lianhu".
AsforthenameofXuanwuLake,itwasfirstseenin448.Itissaidthatblackdragonappearedinthelake,soitwasrenamed"XuanwuLake".Ofcourse,itisimpossibletohaveadragoninthelake,butsomepeoplespeculatethatthetwoso-calledblackdragonsmaybecrocodilesintheYangtzeRiver,becauseXuanwuLakewasstillconnectedwiththeYangtzeRiveratthattime,crocodilescouldtakeadvantageofthetidetovisitthelake.Beforethethunderstorminsummer,becauseofthehotweather,theycameoutofthewaterandweremistakenasblackdragons.