Somewhere at <a href="https://en.wikipedia.org/wiki/New_Idria" class="extiw" title="en:New Idria">New Idria</a> Quicksilver Mine/Ghosttown, California. – "Rock Bubbles?"
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/33989573@N00">Bob n' Renee</a>
CC BY 2.0
originally posted to <b><a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a></b> as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/33989573@N00/343443195">Near New Idria</a>