America Unearthed: Ancient Ruins Discovered in California (S3, E7) | Full Episode | History

Just east of the San Francisco Bay Area are the Berkeley Hills Walls--remnants of a massive, stone wall that stretches a distance of over fifty miles. See more in Season 3, Episode 7, “Marco Polo Discovers America.“ #AmericaUnearthed Subscribe for more from America Unearthed and other great The HISTORY Channel shows: Find out more about the show and watch full episodes on our site: Check out exclusive The HISTORY Channel content: History Newsletter: Website - Facebook - Twitter - The HISTORY® Channel, a division of A E Networks, is the premier destination for historical storytelling. From best-in-class documentary events, to a signature slate of industry leading nonfiction series and premium fact-based scripted programming, The HISTORY® Channel serves as the most trustw