Forget the tropical beach with a red X on the map. The world's most relentless treasure hunt unfolds on a freezing, fog-choked island in Nova Scotia, where generations of searchers have mortgaged homes, ruined fortunes, and even died chasing whatever lies at the bottom of the infamous Money Pit. It has consumed imaginations for over two centuries.

This episode digs into the brutal geology, bizarre artifacts, and stubborn legend of Oak Island. We examine why the dirt itself bankrupts people, whether the whole mystery could be a geological trick, and the genuinely baffling discoveries that keep the obsession alive. It is ultimately a story about the human inability to walk away from a hole in the ground.

• Why Lawrencetown clay till (50% sand, 30% silt, 20% clay) turns into suction-cup mud and then concrete, and how limestone bedrock ...