N64 Skyscraper

Skyscraper is a battle course in Mario Kart 64. The battle takes place on the roof of a giant skyscraper, making it possible to bump opponents off the stage. It is unknown what building the skyscraper is. There are several gaps in the roof, making it easy to accidentally fall.

It's possible the building could be in Mushroom City.

This will appear in the upcoming game Mario Kart Wii for the Wii