View over river Rhine to old town with cathedral and Great St. Martin church, Cologne, North Rhine-Westphalia, Germany

metropolis sight unesco world cultural heritage cityscape architecture europe city transportation unesco north rhine westphalia hohe domkirche st peter und maria landmark gothic cologne building exterior koeln old town urban scene day excursion boat landmark koelner dom outdoors cologne cathedral romanesque national landmark great st martin church local landmark city traffic ship rhine germany