Young Prayer by Panda Bear. By far the most spiritual, psychedelic album I've ever listened to. Panda Bear is a genius. Most of the songs have no tempo, and ALL of them are untitled. Please take a listen and let me know what you think. http://www.last.fm/music/Panda+Bear/Young+Prayer Usually im not into this kind of stuff, but lately thats all i listen to on magic mushrooms.
I can see this album is great on magic mushrooms. I like it. I don't see it as genius stuff or the most psychedelic I've heard though, but it can be felt as spiritual for sure!
Two albums that are always present on a trip are Doe Maar - D.U.B. (It's instrumental so you'll like it no matter where you're from) and Portishead's' Dummy. Not Very spiritual, but very pleasant grooving is Tosca - Susuki If you want a spirituaal trip i'd say go with Tommy
Bullseye of being by Orange Sunshine is spiritual to me on a mushroom trip as well, haha. It's pretty short but especially the (only lengthy) track Ruler of the universe has some really intense sounds on it!