Dam in Bondary, Poland,  on Narew river / Siemianówka Reservoir
Krzysztof Maria Różański, (<a href="//commons.wikimedia.org/wiki/User:Upior_polnocy" title="User:Upior polnocy">Upior polnocy</a>)
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>