The most haunting music you ever heard?


I listened to the acoustic version of "Under the Milky Way" from the band "The Church". I can only describe it as haunting. Jokes aside, which might be too much to ask :-), what is the most haunting music/song or cd you have heard?
mike60
"John Wayne Gacey, Jr." by Sufjan Stevens. When Sufjan sings "oh my God," if you don't get goose bumps, your dead. No pun intended.
Also Jeff Buckley singing "Mojo Pin."
The soundtrack to Magnolia hints at haunting....Its a great piece of mucic and deffinatly can give you some chills....
"Haunting" as in "gets inside your head and your nervous system and won't go away" -- probably, for me, an album titled "Alina," music composed by Arvo Part, on the ECM label. It is just this side of silence, and it is achingly beautiful.
Another vote for Sufjan Stevens' "John Wayne Gacy, Jr.". Quite possibly the most moved I have ever been, in any direction, by any song ever.