THIS IS THE PUERTO PRINCESA UNDERGROUND RIVER IN THE PHILIPPINES AND ONE OF THE SEVEN WONDERS OF THE WORLD!
<a href="//commons.wikimedia.org/w/index.php?title=User:Glennjarz&amp;action=edit&amp;redlink=1" class="new" title="User:Glennjarz (page does not exist)">Glennjarz</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>