From author "Régua, Portugal. Terras do Douro."
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/40145521@N00">Feliciano Guimarães</a>
CC BY 2.0
<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/40145521@N00/3300970079">Broken symmetry</a>