The ruins of <a href="https://en.wikipedia.org/wiki/Greenhalgh_Castle" class="extiw" title="en:Greenhalgh Castle">Greenhalgh Castle</a>, near Garstang, Lancashire, England.
<a href="//commons.wikimedia.org/wiki/User:Dr_Greg" title="User:Dr Greg">Dr Greg</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>