history, border, inner German border, wetland, swamp, biotope, German Democratic Republic, Europe, natural preserve, historic, reserve, Biosphere Reserve, post-war era, East Germany, nature reserve, contemporary history, way, Germany, area, ditch, drainage canal, Drömling natural preserve, Central Europe, County, GDR border installation, GDR border, Grassland, Perforated Plate Path, inner German border installation, Fen, frontier, German-German border, wet land, bog, GDR, nature park, historical, protected area, Biosphere Park, post-war period, Eastern Germany, path, German Federal Republic, moat, drainage ditch, Middle Europe, district, inner German border fortification, lowland moor, border station, inner-German border, wetland biotope, moor, Naturpark, sanctuary, post-war years, nature conservation area, Republic of Germany, Drömling, lowland fen, boundary, marsh, DDR, conservation area, natural reserve, FRG, environmental reserve, borders, wetlands, swamps, biotopes, natural preserves, reserves, Biosphere Reserves, post-war eras, nature reserves, ways, areas, ditches, drainage canals, Fens, historically, paths, drainage ditches, lowland fens, BRD, Europe's, historical image, history image, history images, NSG, natural park, inner-German border fortification,