Oak Island is a privately owned island located on the south shore of Nova Scotia, Canada
People have been digging for treasure on Oak Island for over 200 years
There is an island to the east called Frog Island. In the 1860s it was found a tunnel under the sea bed between two islands makes sure valuables can be cached on Frog Island. Similarly, Frog I. has a rectangular-shaped swamp and a (now-flooded) pit where valuables may have once been hidden or still are. Daniel J. Sullivan excavated and found non-natural dig evidence back in the 1970s. The island is owned by Carl Potter.
The Ark of the Covenant and the Holy Grail as well as other religious artifacts may have been buried on Oak Island.