is the land of Ooo the opposite of the land of Aaa?

To answer our FioLee pic spammer (no offense):

Either, Aaa is just part of the post-apocalyptic Pangaea (my theory),

অথবা an alternate dimension that does not exist (Ice King and Marcy's, canon),

Or, the past of Ooo (freakin' weird ideas from mothertruckin' fans).

Absolutely!