old abandonded bunker mo-s-20 orel from world war 2 on the czech and polish borders to protect again the german army with the t-34

agriculture air architecture army attraction borders bunker concrete countryside czech czechoslovakia darkovicky defense europe field fortification fortress germany history landscape memorial military museum nature old open orel poland polish protection republic ropik ruin rural season sky straw summer t34 tank tourism travel vehicle war world ww2 yellow