Watch all new episodes of Ancient Aliens returning soon, and stay up to date on all of your favorite History Channel shows at https://history.com/schedule.

A strange UFO sighting in Susa Valley, Italy, leads to the construction of Sacra di San Michele, and according to theorists, it sits on an energy line connected to extraterrestrial gods, in this clip from Season 14, "The Alien Mountain". #AncientAliens
Subscribe for more from Ancient Aliens and other great HISTORY shows:
http://histv.co/SubscribeHistoryYT

Find out more about the show and watch full episodes on our site:
https://histv.co/AncientAliens

Check out exclusive HISTORY content:
History Newsletter - https://histv.co/newsletter
Website - https://histv.co/History
Facebook - https://histv.co/Facebook
Twitter - https://histv.co/Twitter

"Ancient Aliens" explores the controversial theory that extraterrestrials have visited Earth for millions of years.

HISTORY® is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, premium documentaries, and scripted event programming.