North Pole

The North Pole is the home of Santa Claus.

History
Marge wanted Bart and Lisa's letters to Santa so she could send them to Santa's workshop at the North Pole.

Bart dreamt that he stole Santa Claus's sleigh, complete with presents, when he aimed a gun at Santa at the North Pole.

Non-canon
When the Polar Express comes to 742 Evergreen Terrace and picks up Bart, it takes him to the North Pole. Here, he works his way up through the ranks of elves so he can meet Santa. He goes to kill Santa as he didn't give Bart a dirt bike. However, Santa says that he has no money. Bart believes him and leaves. Santa then reveals that he has lots of money and presses a button to turn his office into a club-like room with lots of girls.