Mesoamerican monoliths and zoomorphic stones covered in royal visages, ancient mythology, and grand celestial events.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A Biblically notable site over the ruins of an ancient city that is now a protected World Heritage site.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

The ship that got left behind.

When ecosystems collide in the arid Southwest.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The world's largest dark sky preserve is a Canadian park established to preserve the country's last wood bison.

Prehistoric park filled with the fossils of dozens of extinct species including Australian megafauna.

Hauntingly beautiful totem poles left by the Haida.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.