Exploring below ancient ruins to search for clues pointing to the true fate of the Mayan empire.

42min • , TV-PG • , Sep 07, 2021 • , CC

Don explores top-secret military and government tunnels.

42min • , TV-PG • , Sep 14, 2021 • , CC

Don uses brand-new mapping technology to expose the uncharted spaces beneath American cities.

41min • , TV-PG V,L • , Sep 21, 2021 • , CC

Discoveries lie under the streets of today's greatest cities.

41min • , TV-PG L • , Sep 28, 2021 • , CC

Discoveries lie under the streets of today's greatest cities.

41min • , TV-PG • , Oct 05, 2021 • , CC

Don goes deep beneath a Knights Templar stronghold in Turkey to explore a provocative theory.

41min • , TV-PG V • , Oct 12, 2021 • , CC

Don explores the massive underground cities in the mountains of Turkey.

41min • , TV-PG L • , Oct 19, 2021 • , CC

Don follows the clues hidden underground as he searches for evidence of 10,000 Aztecs.

41min • , TV-PG • , Oct 26, 2021 • , CC