Unfinished millstone with central hole covered by tree litter in the Andatza mountain of Usurbil (Basque Country)
<a href="//commons.wikimedia.org/w/index.php?title=User:Asier_Iturralde_Sarasola&amp;action=edit&amp;redlink=1" class="new" title="User:Asier Iturralde Sarasola (page does not exist)">Asier Iturralde Sarasola</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>