The Bermuda Triangle
You won't find it on any official map and you won't know when you cross the line, but according to some people, the Bermuda Triangle is a very real place where dozen of ships, planes and people have disappeared with no good explanation. Since a magazine first coined the phrase "Bermuda Triangle" in 1964, the mystery has continued to attract attention. When you dig deeper into most cases, though, they're much less mysterious. Either they were never in the area to begin with, they were actually found, or there's a reasonable explanation for their disappearance.
Does this mean there's nothing to the claims of so many who have had odd experiences in the Bermuda Triangle? Not necessarily. Scientists have documented deviations from the norm in the area and have found some interesting formations on the seafloor within the Bermuda Triangle's boundaries. So, for those who like to believe in it, there is plenty fuel for the fire.