pfalzgrafenstein castle. near kaub in the middle of rhine river, a unesco world heritage site upper middle rhine valley

buildings castle castles cruise customs falkenau fee germany heritage hill hilltop hiltop historic island kaub knights landscape medieval middle pfalz pfalzgrafenstein rheingau rheinland rhine rhineside river scenic site toll top tour tower town unesco upper valley vin vine vineyard vineyards walls world yard yards zollburg