This documentary, Cracking the Shakespeare Code - Part 1/3 makes a great case for the mysteries of Oak island being hidden in the works of Shakespeare.
That probably needs a little elaboration.....
Long story short - Templars got their hands on some fancy shiny loot from Solomons Temple. After the Order was persecuted in 1307, the Sinclair's moved some of the templar treasure from Scotland to Nova Scotia. The Sinclair's had knowledge of viking voyages and likely from ancient maps (the same info Columbus used). Skip forward a few generations and Francis Bacon is feeling poetic, so him and his Rosicrucian buddy's write up some plays, throw in a bunch of acrostics, ciphers, sacred geometry and astronomical pointers and get some Stratford bloke called William to front the gig.
Joking aside, this is a truly compelling and fascinating documentary that I cannot recommend enough. There is also a 4 part series called Sweet Swan of Avon.
I'd be very curious to know what you think of the theories presented in the documentary.