Legend has it that Oak Island is cursed. Its treasure will only be found once seven people have died looking for it. This monument remembers the six deaths – so far.

There are stories of ghosts and mysterious lights guarding buried treasure in the area around Oak Island. Many of these stories were recorded by this folklorist, Helen Creighton.

This is Shag Harbour, the site of a famous UFO sighting in Nova Scotia.

Some believe the engineering on Oak Island is so complicated that it must have been built by aliens, like the ones who visited Shag Harbour.

Another theory is that Oak Island is a prison, not a hiding spot. Could it be hiding terrifying monsters like these ones from a medieval manuscript?

John Bell explores these and more explanations for the unexplained in his book Oak Island Illustrated. In fact, he covers every one of the theories described on this website.

Read on for even more theories and clues!