Modern retorts used to produce charcoal (in charcoal burning). Lipna, Beskid Niski, <a href="//commons.wikimedia.org/wiki/Poland" class="mw-redirect" title="Poland">Poland</a>.
Tomasz Kuran aka <a href="//commons.wikimedia.org/wiki/User:Meteor2017" title="User:Meteor2017">Meteor2017</a>
Photo taken by <a href="//commons.wikimedia.org/wiki/User:Meteor2017" title="User:Meteor2017">Meteor2017</a>