Prog with sound effects/ use of studio

[Mike413]

I asked this over at Prog Archives but the kiddies weren't of much help. I would like to know what albums make use of the studio and have good sound effects. Some obvious examples include Pink Floyd's "dark side of the moon," King Crimson's "lark's tongues in aspic," and Yes's "fragile." "Close to the edge"(also by Yes for those of you brand new to prog) is another one(for the opening and closing section of the title track). Can anyone give me some lesser known examples? It could be anything from nature sounds to a animal sounds to just about anything as long as it has music and isn't just sounds put the together with no music(ie revolution 9). Thanks.