Sun Ra—Strange Strings
I got this based on the write up in that list and, damn, am I impressed. I don't think I've ever heard music that sounds as incredibly alien as this does. When I listen to this for some reason all I can imagine is that I'm an astronaut in some 1950s science fiction comic like the one below. I stumble into one of the towns those weird, green, blobby aliens live in and discover an orchestra playing in a purple cave. The music they are playing sounds exactly like this album.
