The mysterious disappearances within the Bermuda Triangle has always drawn in bizarre explanations most of which blame UFOs or the Lost City of Atlantis. I remember seeing a movie once that I can't find for some reason about these people travelling through this area and end up on this deserted cruise ship. Once they go on board they find ghostly versions of themselves and their travelling companions that speak of the haunted waters.
I've always loved the idea of this being the resting places of Atlantis over and above the idea of UFOs, to be honest.
Take a character (either from your current WIP or one you've been dying to put into a story) and put them in a caravan of travellers journeying through the area of the Bermuda Triangle.
What would happen if these characters came across an island in the middle of the Bermuda Triangle, instead of a ship?
Imagine your character and their travelling companions decide to go onto the island, but within minutes, they've lost track of each other.
And your character can't help but shake the disturbing feeling they are being watched.
What happens next?