Detail view of Los Aguarales de Valpalmas, a rare, fragile and dynamic geological phenomena located near <a href="https://en.wikipedia.org/wiki/Valpalmas" class="extiw" title="en:Valpalmas">Valpalmas</a>, <a href="https://en.wikipedia.org/wiki/province_of_Zaragoza" class="extiw" title="en:province of Zaragoza">Zaragoza</a>, Spain. The landscape is the result of water flows over fragile material in a process known as <i><a href="https://en.wikipedia.org/wiki/Internal_erosion" class="extiw" title="en:Internal erosion">piping</a></i>.
<bdi><a href="https://www.wikidata.org/wiki/Q28147777" class="extiw" title="d:Q28147777"><span title="Spanish photographer (1974-)">Diego Delso</span></a>
</bdi>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>