Where did mike and sully get banished to?

Mike and Sully were banished to the human world in the movie "Monsters, Inc." after they were wrongfully accused of scaring a child, which is considered a serious offense in the monster world. They ended up in a remote area of the human world and had to find their way back while dealing with various challenges. Their adventure ultimately leads them to discover the true nature of laughter and how it can be more powerful than fear.