I thought about this song from the opening guitar riff, but haven't been able to retrieve it from my mind. It's very frustrating! Any ideas of similar songs when you listen to the opening guitar riff? It would probably be a melancholic song, starting with a guitar as well, and with a slower tempo but very similar (at least to me).
The introduction of Down In a Hole is a little a similar to the chord progressions of Cowgirl in the Sand by Neil Young and Horse With No Name by America. The high, held and wordless backing vocal is a little like that of the intro to Gimme Shelter by the Rolling Stones.