Last existing building of Thiederhall potassium chloride plant, at the Thiederhall potash mine. Salzgitter-Thiede, Lower Saxony, Germany.
<a href="//commons.wikimedia.org/wiki/User:Markscheider" title="User:Markscheider">Markscheider</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Markscheider" title="User talk:Markscheider"><span class="signature-talk">talk</span></a>) 17:04, 19 February 2011 (UTC)
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>