Le Griffon, the lost ship

In 1679 the explorer La Salle built the Griffon, the first full-sized sailing ship on the upper Great Lakes, loaded her with furs, and sent her home. She sailed into a September gale and was never seen again, the first shipwreck of the inland seas and still the great unsolved one, the Holy Grail of Great Lakes wrecks. Hunters have claimed to find her in Ontario and Michigan waters for a century; none has proven it.