Your favorite 'concept' album

I'm not a concept album fan, however there are a few I've gone down the rabbit hole with. My personal fave, is '10,000 Years' by The Honeydogs. The backstory & lyrics are so vivid, and futuristic, it never fails to reveal something new to me. Even the bandleader said at times he's not sure what it's about.

Fascinating info & interview in the url. Check it out! 

Any others? 
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The Man From God Knows Where by Tom Russel is pretty darned excellent.
Caress of Steel and Hemispheres by Rush
One you should really check out is Ovo by Peter Gabriel.