A military bunker structure located near Międzyrzecz, Poland, at coordinates 52.5564966, 15.409108. The designation 'Pz.W.850' suggests a possible German WWII-era classification (such as 'Panzergraben' or 'Widerstandsnest'), though this cannot be confirmed from available sources. The region of western Poland saw significant military construction during the Second World War.
No specific historical details, function, or current condition for this particular site are provided in the consulted materials.