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?
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These covers describe perfectly the contend 

Alphataurus, 1973 triple fold out
Yessongs, 1973 4-piece fold out cover by Roger Dean
Demons and Wizards & The Magician´s Birthday, both 1972 by Roger    Dean are his finest
Tales from Topographic Oceans, 1973 his 4th best
Relayer, 1974 his worst, grey and dull like music it contains except wonderful "Soon" section
Greenslade, both 1973 also by Roger Dean
Look at Yourself by Uriah Heep, 1971
Very ´eavy.... Very ´umble by Uriah Heep, 1970
Deep Purple in Rock, 1970
Trespass by Genesis, 1970 
Benefit by Jethro Tull, 1971
Aqualung by Jethro Tull, 1971
Valentyne Suite by Colosseum, 1969 the 1st on Vertigo Label
Colosseum Live, 1971
Pictures at an Exhibition & Tarkus by ELP, 1971
Pink Floyd´s Hipgnosis covers, all great
Tormato by Yes, 1978 Hipgnosis´ most clever cover
Twin Peaks Mountain Live, 1974
Harakka Bialoipokku by Pekka Pohjola, 1974
Uomo di pezza by Le Orme, 1972
Blue Öyster Cult, 1972 -75
The Sensational Alex Harvey Band´s cartoon covers, 1974-75
Boston covers, 1976-86 
Point of Know Return by Kansas, 1977 their finest album
Infinity by Journey, 1978 their best album
Obsession by UFO, 1978 their best album 
Asia, 1982-83 by Roger Dean at his best (again)