A <a href="//commons.wikimedia.org/wiki/Caterpillar_D9" title="Caterpillar D9">Caterpillar D9</a>T in a 6,500 acre facility used for testing a variety of mining equipment.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/137458575@N05">MINING.com</a>
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/137458575@N05/22621586725/">Caterpillar Tinaja Hills Demonstration &amp; Learning Center</a>