Narewka river in <a href="//commons.wikimedia.org/wiki/Nature_reserve_Wysokie_Bagno" title="Nature reserve Wysokie Bagno">Nature reserve Wysokie Bagno</a>, Białowieża Forest, Poland.
Agnieszka Kwiecień (<a href="//commons.wikimedia.org/wiki/User:Nova" title="User:Nova">Nova</a>)
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>