bledow desert area of sands on the silesia highlands

2000 activity africa ages anthropogenic biala bledow bledowska chechlo cross desert devil drive dune dunes fulguryt german glacier glaciers grainsriver ground highlands human klucze korps landscape legend lesser life loose malopolska melting middle military mine mirage motorbike natura natural naturally nature olkusz origin paratroops poland program protective proving przemsza quartz sand sands sandstorm silesia silver soldier szczakowa train traverse udetfeld upland voivodeship