What is hidden at Oak Island?

Context: Oak Island has been a subject for treasure hunters ever since the late 1700s, with rumours that Captain Kidd's treasure was buried there. While there is little evidence to support what went on during the early excavations, stories began to be published and documented as early as 1856. Since that time there have been many theories that extend beyond that of Captain Kidd which include among others religious artifacts, manuscripts, and Marie Antoinette's jewels. The "treasure" has also been prone to criticism by those who have dismissed search areas as natural phenomena.

Answer: Oak Island is rumored to have Captain Kidd's treasure buried. However despite numerous excavation attempts over the past 100 years nothing has been discovered. There are other theories which claim religious artifacts, manuscripts, or Marie Antionette's jewels are hidden at Oak Island.