A gargantuan stone arch marks the entrance to a vast “Paleolithic Cathedral” recently stumbled upon by explorers in Spain.
This hulking beam of eroded living rock—set along Spain’s impressive Almadenes Canyon—took millennia to form. It now comprises the great façade of a newly-discovered, sprawling cave system. Aptly called Cueva del Arco (Cave of the Arch), the cave has been deemed a “world-class discovery” that may hold keys to understanding our ancient past.
