What's your favorite album cover art ?


While re-organizing my album collection, I found myself admiring the quality and beauty of the album cover jacket. One artist that really caught my attention was Roger Dean who did all (most) of the YES cover jackets. You just don't get this quality of art on CD jewel case inserts. What are your favorite album cover jacket art?
brf
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Beautifull album covers: 

1) Arbour zena (Keith Jarrett) ==> ECM 
2) Officium (Jan Garbarek & Hilliard ens.) ==> ECM 
3) Woyaya (Osibisa) 

remark: 
==> ECM record's in general have nice covers
(One of the reasons I prefer vinyl)