Fort of San Carlos in <a href="https://en.wikipedia.org/wiki/Santo%C3%B1a" class="extiw" title="en:Santoña">Santoña</a> (<a href="https://en.wikipedia.org/wiki/Cantabria" class="extiw" title="en:Cantabria">Cantabria</a>, <a href="https://en.wikipedia.org/wiki/Spain" class="extiw" title="en:Spain">Spain</a>).
<a href="//commons.wikimedia.org/wiki/User:David_Perez" title="User:David Perez">David Perez</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>