What on Earth?

What on Earth?

Ancient Rome's El Dorado (11x10)


: 24, 2022

Aerial archaeologists capture bizarre, spider-like markings etched deep into the mountains of Northern Spain; experts investigate an ancient site that contained one of the largest and most important gold mining operations of the Roman Empire.

  • : 2015
  • : 163
  • : 23
  • Science Channel
  • 21