upper middle rhine valley unesco world heritage site, pfalzgrafenstein and gutenfels castle, kaub, rhineland-palatinate, germany

attraction banner bastion beautiful blue castle castles central customs destination environment europe european falkenau famous forested fort fortification fortifications fortress german germany gorge gutenfels heritage hills hillside hillsides historic history idyllic island kaub landscape lower middle mountains narrow natural nature old outcroppings palatinate panorama panoramic peaceful pfalzgrafenstein quiet rhine rhineland rhinelandpalatinate river rock rocks romantic roofs shaped ship site sky slate spires station tourism tourist tower towers turrets unesco upper valley vineyards white wooded world