Title: W kręgu tajemnic "Riese"
Subjects: Tunnels, Fortification, World War, 1939-1945, Engineering and construction, Tunnel warfare, Military engineering, History, Polish Personal narratives, Personal narratives, Riese (Concentration camp), Gross-Rosen (Concentration camp), Military History, Biography
Places: Poland, Sowie Mountains, Germany
Time periods: 20th century, Occupation, 1939-1945