Here's another island, Oak Island, offshore from Nova Scotia, Canada, which has its own Money Pit:
The story of the Oak Island Money Pit Treasure is fascinating and complex.
Is this a natural sinkhole? Is this a sunken family dwelling of prehistoric times? 13,000 years ago, the sea level was much lower than it is now. But coconut fiber? This is not something natural. Did travellers bring the coconuts with them? Or was Nova Scotia a land of tropical warmth thousands of years ago - as suggested by Erickson's, "Vine-land"? Could coconut fiber survive for so long, in cold waters? Could it really be that this pit was made only hundreds of years ago - by the Knights Templar? Were the layers of metal bits layers of coins? Whatever is the story - Oak Island's "Money Pit" has in fact been a huge sucking money pit, with many people, and money, being thrown down into it, over many, many years, and with nothing conclusive yet being found. Apparently, the History Channel has made a series about it. And you know what? I bet this legend inspired the movie, "The Goonies".
The Lost Treasure of the Knights Templar: Solving the Oak Island Mystery
The Site. (See also THIS, THIS & THIS).