I remember reading about Oak Island and its mysterious "Money Pit" when I was a child. It's interesting to see that it's not only a real place, but it's for sale.
For those unfamiliar with the Money Pit, it's a hole discovered in 1795 that has been theorized to hold all kinds of treasure. Whomever dug the pit created a trap so that no matter what is attempted to excavate it, the pit floods. In successive years those attempting to solve its riddle and find the treasure have sacrificed millions of dollars and six lives.