Toronto

Toronto is a city in Canada. It is the capital city of Ontario.

History
After Greta Wolfcastle dumped Bart in favor of Milhouse Bart decided to travel to Toronto, where Greta's father was shooting a movie, in an attempt to win back her love.

The Simpson family once moved to Toronto to escape an economic crisis in Springfield.

When Bart tried to use his free carnival rides coupon from a  comic at a ticket booth they tell him that it is only valid in Zenith City. Bart then became angry and said to the cashier that Zenith City is like Metropolis, Gotham City, or Toronto - it doesn't really exist.

Non-canon
Troy McClure starred in the movie, An American in Toronto.

Trivia

 * When Greta tells Bart that she is going to Toronto he initially believes that the city is in Spain.