It may be less a clue than the reason the mystery never dies.

The Oak Island legend collapses under its own logic: anyone wealthy enough to engineer an elaborate treasure vault was certainly motivated enough to come back for it. This final video in the series ...

Centuries-old clue: The Oak Island cipher stone, found about 90 feet underground in the early 1800s, allegedly pointed to buried riches. Lost and unverified: The stone vanished without early sketches ...

The Oak Island cipher stone is irresistible. It’s a buried slab with strange symbols and a message that supposedly points to a fantastic treasure worth millions of dollars just a little deeper ...