Popol Vuh - Nosferatu (1978)
Awesome German soundtrack from an awesome band. Uses loops and synth very effectively. Has a lot of Eastern folk influences.
Old Man Gloom - Christmas (2004)
Drone/doom metal side project of Isis frontman. One of the best post-metal albums I've listened to and one certainly interesting enough to check out yourself.
Lilys - Everything Wrong Is Imaginary (2006)
Feckin' sweet album that sounds like a cross between British Sea Power and Spacemen 3. This dude can play music.
Nico - The Marble Index (1969)
I've never really been a fan of Nico's singing (or her music with the VU, for that matter), but this record is a glorious soundscape composed with classical and folk roots.