Prepare to be Creeped Out! 

The following video features audio from a numbers station, which is a shortwave radio broadcast featuring codes for spies and saboteurs.  These things started in the Cold War and they still exist today.  Many of them are creepy, but the one called Swedish Rhapsody has got to be the creepiest.  Someone made this video and increased the creepy level by about 90%.  The good stuff starts at about the one minute mark.  Enjoy!