Kavac cave (Canaima National Park)
<a href="//commons.wikimedia.org/wiki/User:Wilnel_Jos%C3%A9_Verd%C3%BA_Guerrero" title="User:Wilnel José Verdú Guerrero">Wilnel José Verdú Guerrero</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>