A look into the underground cavity that turned out to be the entry of WW2 shelters. At Ledningsplats Björn, May 2015, prior to archaeological excavations.
<a href="//commons.wikimedia.org/w/index.php?title=User:Stamboliyski&amp;action=edit&amp;redlink=1" class="new" title="User:Stamboliyski (page does not exist)">Stamboliyski</a>
2015-05-11 10:29:57
<span class="int-own-work" lang="en">Own work</span>