Octagonal building, <a href="https://en.wikipedia.org/wiki/Fort_Miley_Military_Reservation" class="extiw" title="w:Fort Miley Military Reservation">Fort Miley Military Reservation</a>, San Francisco, California, USA<br>Fort Miley (p7040130)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/uzvards/">Vards Uzvards</a>
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/uzvards/372697268/">Flickr</a>