Maybe it's the hole where the UFO's go! To their base deep inside the earths crust. How many UFO's are seen over the Atlantic? Isn't that where an entire flight of planes vanished years ago?
Hole could mean entrance tunnel!
Hey- it's as good a theory as any!
"Maybe it's the hole where the UFO's go!"
Go here and then google "the hollow earth"
http://www.crystalinks.com/hollowearth.html