Psychadelic/Avant-Garde maps

Can anyone point me in the direction of some really abstract, trippy maps? I know about The Sky May Be, but is there anything else in that category out there that's worth checking out?

http://www.mediafire.com/download/om1oszr45c7ooxe/SSHU+EASTER+EGG.PK3

Not exactly "abstract", but this one is really strange:

http://www.doomworld.com/idgames/index.php?file=levels/doom2/Ports/g-i/imposs.zip

This one will bend your wookie...

Aluqah has made several wacky ones

http://doomwiki.org/wiki/Aluqah

Ones I've tried:

http://www.doomworld.com/idgames/?id=14521
http://www.doomworld.com/idgames/?id=15892
http://www.doomworld.com/idgames/?id=16462
http://www.doomworld.com/idgames/?id=14670

I think gggmork pretty much established a monopoly in the avant-garde field.

Monochrome mapping project.

http://www.doomworld.com/idgames/index.php?file=levels/doom2/Ports/v-z/void.zip

Jack101's stuff (Beyond Reality, Mayhem Mansion) is quite out there.

In a more classical (less ZDoomy) vein, the aesthetics of Ribbiks' maps like Swim With The Whales and Stardate 20X6 probably qualify.

Grove - http://www.doomworld.com/idgames/index.php?file=levels/doom2/Ports/g-i/grove.zip
Impossible - A new reality - http://www.doomworld.com/idgames/index.php?file=levels/doom2/Ports/g-i/imposs.zip

You mean something like this?

check out this thread too: http://www.doomworld.com/vb/wads-mods/61039-odd-unique-surreal-architecturally-unconventional-maps/

Just played this cool weird classic style map from 2000:

Pool Party - http://www.doomworld.com/idgames/index.php?file=levels/doom2/p-r/poolprty.zip