round tower of the genovevaburg, mayen, germany

wind white walls wall volcano vehicle typical travel town towers tower surface structure street stone steeple stands spire small skyscraper skyline sky showcasing round roughly red rectangular punctuate openings old monument memorial medieval mayenne mayen mast lighting landmark hewn green germany german genovevaburgs genovevaburg fortified flagpole flag features facade european eifel downtown displays design defensive dark cylindrical clear city castles built building bricks blue atop architecture architectural