The Mario universe is vast and nearly infinite. Although in most cases, we find Mario running around places with weird names like Mushroom Kingdom, Yoshi's Island or the Star World.
But it turns out that one of the Mario Bros. adventures took them to a little city we like to call Montreal.
Originally released in 1992, "Mario is Missing" was the first title to star Luigi instead of Mario, and the plot is simply fantastic:
"Bowser sets up a castle in Antarctica, and plans to use many hair dryers (...) to melt Antarctica's ice and flood Earth. He sends Koopas to cities across Earth to steal artifacts to fund his operation."
So Luigi has to follow clues in order to know which city to visit so he can retrieve the artifacts first.