Sure, psychadellia albums were in abundance in the 60's & 70's. But being a child of the 80's/90's, it has to be:
Primal Scream - Screamadelica (1991).
4 cans of Special Brew and Screamadelica (at the age of 21) never failed to have interesting results. Until then I never thought it was possible for so much vomit to come from one person in a 24hr period. The album cover always seemed to be sniggering at you?!?!