Favorite acoustic songs by metal bands

Opeth: windowpane(some electric, oh well it's the best Opeth song)],benighted,harvest.

Novembers Doom: twilight innocence

I was going to list some Alice In Chains, but even jar of flies has some electric.
 
Iron Maiden - Prodigal Son

Not entirely acoustic, but it is enough so to qualify I think.
 
We have lots more...

In Flames - "Acoustic Medley"
At The Gates - "And the World Returned"
Saturnus - "For Your Demons" (maybe the sadest song ever?)
Saturnus - "The fall of Nakkiel (Nakkiel has fallen)"
Saturnus - "As we dance the path of fire or solace"
Saturnus - "Lament for This Treacherous World"
Saturnus - "Thou Art Free" (the one from Martyre of course)
Saturnus - "In Your Shining Eyes" (some electronics though)
Necare - "Stillborn Twilight"
Draconian - "Una Tertius"
Draconian - "Gracefallen"
Authorize - "Nothingness"
Sepultura - "The Abyss" (The beginnig of "Inquisition Symphony" is also incredible)

Also "J'ai Fait Une Promesse" by Anathema, not as good as Everwake though.

Other than that I have to agree that all the acoustics by Dissection are outstanding.