aerial view of schonburg castle above the rhine river and oberwesel with restored gothic palace and towers

world wine walls wall walk vineyards views valley unesco undefined travel town towers tourist tourism structures stronghold streets stone sightseeing schapara scenic ruins romantic romanesque river rhine rheinlandpfalz restoration region ramparts preservation panorama oberwesel nburg middle medieval loreley landscape landmark houses history historic hiking heritage halftimbered gothic germany german gate fortress fortifications europe defensive cultural cruise cobblestone city castle burg attraction architecture ancient ages