The Outlands is the name of an unincorporated region beyond Springfield. It was populated by a colorful variety of society rejects and lowlifes who cherished the anarchy and freedom from government supervision. Julian Assange, the fugitive founder of WikiLeaks, kept a secret headquarters there.
The Simpsons settled in the Outlands after being kicked out of Springfield. Eventually, nearly all of the residents of Springfield, tempted by the promise of a better community, moved to the Outlands and rebuilt it into a replica of what they left behind.