Andacollo: Mercury evaporation to produce gold.
<a href="//commons.wikimedia.org/w/index.php?title=User:Katja_Radon&amp;action=edit&amp;redlink=1" class="new" title="User:Katja Radon (page does not exist)">Katja Radon</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>