<a href="https://en.wikipedia.org/wiki/Osowiec-Twierdza" class="extiw" title="en:Osowiec-Twierdza">Osowiec-Twierdza</a> 8. <a href="https://en.wikipedia.org/wiki/Biebrza_National_Park" class="extiw" title="en:Biebrza National Park">Biebrza National Park</a> headquarters
<a href="//commons.wikimedia.org/wiki/User:Henryk_Borawski" title="User:Henryk Borawski">Henryk Borawski</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>