bunker defenses in a filthy forgotten woodland

air antiaircraft army background battle bulge bunker bunkers canyon concrete defence defenses environment fairy filthy foliage footpath forest forgotten fortification fortresses german germany gorge green hiking historic karlstal karlstalschlucht land landscape leaf leaves location military natural nature old palatinate palatine raid ravine remains remote rhine rhineland rhinelandpalatinate rock ruins rural sandstone scenery shelters soldier some tale the trail tree trippstadt trunk underground wall war woodland world