The crew locates a mysterious tunnel while doing a major excavation. See more in this clip from Season 12, Episode 16, "Open Sesame." Watch all new episodes of The Curse of Oak Island, returning Tues., Feb 25 at 9/8c, and catch up on previous episodes at www.history.com #OakIsland Subscribe for more from The Curse of Oak Island and other great The HISTORY Channel shows: http://histv.co/SubscribeHistoryYT Find out more about the series and watch full episodes on our site: https://histv.co/OakIsland Check out exclusive The HISTORY Channel content: History Newsletter - https://histv.co/newsletter Website - https://histv.co/History Facebook - https://histv.co/Facebook Instagram - https://www.instagram.com/history TikTok - http://bit.ly/4kZKjXi "The Curse of Oak Island" follows brothers Marty and Rick Lagina as they investigate the mystery of a buried treasure on Oak Island off the coast of Nova Scotia, Canada. 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 trustworthy source of informational entertainment in media. The HISTORY® channel has been named the #1 U.S. TV network in buzz for seven consecutive years by YouGov BrandIndex, and a top favorite TV network by Beta Research Corporation. For a deeper dive, visit history.com or follow @history on Instagram, Twitter, Facebook, YouTube and TikTok. For additional press materials visit the A+E Networks Press Center at http://press.aenetworks.com.