As you probably gathered I have a keen interest in WW2 history and visit any related sites.
If you are also interested in more modern military history , you can visit Borno Sullinowo... It a Russian miliary camp , used for housing mobile nuclear missile forces...Its quite near me...
A lot of the stuff above ground has been destroyed , but there are miles of underground bunkers to explore...
Dont go alone tho , and take some rope and a pair of wellies there is some flooding in parts , and i did hear a German tourist fell down an unseen shaft under the water and drowned...