3
Traces of the ancient South American city can still be found in the roads and structures of modern Mexico.
7
Archaeologists have discovered a tunnel and chamber hidden beneath the 2,000-year-old Pyramid of the Moon.
4
Archaeologists have discovered a mysterious tunnel underneath the ancient city's Pyramid of the Moon.
64
Significant quantities of the metal have been found inside the Pyramid of the Feathered Serpent.
15
Archaeologists excavating a subterranean tunnel below the ancient city have unearthed three new chambers.