Part of the <a href="//commons.wikimedia.org/wiki/Category:Ecokathedraal_(Mildam)" title="Category:Ecokathedraal (Mildam)">Ecokathedraal</a>, a land art project near <a href="//commons.wikimedia.org/wiki/Category:Mildam" title="Category:Mildam">Mildam</a>, a village in the Dutch municipality of <a href="//commons.wikimedia.org/wiki/Category:Heerenveen" title="Category:Heerenveen">Heerenveen</a> (<a href="//commons.wikimedia.org/wiki/Category:Friesland" title="Category:Friesland">Fryslân</a>), initiated in the seventies by <a href="//commons.wikimedia.org/wiki/Category:Louis_le_Roy" title="Category:Louis le Roy">Louis le Roy</a> (1924-2012).
<p><a href="//commons.wikimedia.org/wiki/User:Wutsje" title="User:Wutsje">Wutsje / Wikimedia Commons / CC-BY-SA 3.0</a>
</p>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>