Nirvana/Nightmare Fuel

• "Polly". It's pretty creepy enough on its own, but then you learn the true story that inspired the song, and it takes on a whole new level of disturbing.
• "Negative Creep" has a very chilling atmosphere to it, especially since Cobain sings that he is a "stoned, negative creep" and that "daddy's little girl ain't his girl no more", which makes you shiver over the idea of a child/teen and its lost innocence.
• "Drain You" about two babies who try to drain each other...
• "Paper Cuts" is a less obvious example until you discover the lyrics (NSFW). Then it becomes almost as disturbing as "Polly". . . Almost.
• The music video for "Heart-Shaped Box".
• It can be possible to almost fall asleep listening to Nevermind, only to be jarred back awake by "Endless, Nameless"
• While "Where Did You Sleep Last Night?" in Leadbelly's original version ("The Pines") is a cheerful and jolly song, Cobain transforms it into a haunting ballad where he sings he's going to the pines where the "sun never shines" to "shiver all night long." He also adds that "a head of a disembowled corpse was found, but the body was never found." An extra spooky dimension is that this song was Cobain's last recorded song before he died.