Lake Steinbruvann in Oslo (Norway)
<a href="//commons.wikimedia.org/wiki/User:Mathias-S" title="User:Mathias-S">Mathias Stang</a> (<a href="https://no.wikipedia.org/wiki/Bruker:Mathias-S" class="extiw" title="no:Bruker:Mathias-S">no:</a>)
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>