<a href="https://en.wikipedia.org/wiki/Keys_Desert_Queen_Ranch" class="extiw" title="en:Keys Desert Queen Ranch">Desert Queen Ranch</a> - Two oxen or mule pulled mill used to crash ore during gold extraction.
<a href="//commons.wikimedia.org/wiki/User:Jarekt" title="User:Jarekt">Jarek Tuszyński</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>