A ship that sank in 1907 was recently discovered on the bottom of Lake Superior.  The sinking of the Cyprus remains clouded in some mystery.  You can read the story here:Century old shipwreck found in Superior Here was something interesting from the article:

"Thousands of shipwrecks"??  This goes back to our discussion on the Edmund Fitzgerald - how does a ship sink in a lake, much less "thousands" of ships?  Living in a state the borders one of the Great Lakes I realize that these are massive bodies of water.  I can understand how smaller crafts would go down.  How some of the larger ones sink is less evident.