Casa del Monte at Hearst Castle, San Simeon, California, USA. Photograph was permitted without restriction in and around the castle. All artwork is old enough so that it is in the public domain.
<a href="//commons.wikimedia.org/wiki/User:Daderot" title="User:Daderot">Daderot</a>
<span class="int-own-work" lang="en">Own work</span>