old fortress koenigstein, frederick tower, saxon switzerland on a stormy day, germany

ruins rock building castle fortification landmark terrain cliff tourism formation landscape bridge saxon switzerland national park germany elbe located valley south-east saxony hill rocks nature architechture ancient scenic destination travel spring outdoor scenery hiking view lilienstein rocky huge aerial panoramic cloudy rainy koeningstein hilltop fortress konigstein river fortifications frederick tower friedrichsburg christiansburg observation floor flanking ballroom