Mushroom Kingdom

The Mushroom Kingdom is a huge section of the world, ruled over by Princess Peach. There are a few divisions outside of it, mainly Bowser's Castle, Dinosaur Land, Sarasaland, Rogueport, and others.

Landmarks

 * Peach's Castle
 * Toad Town
 * Mario Bros. House
 * Diamond City
 * WarioWare Incorporated
 * Bob-Omb Battlefield

Behind the Scenes

 * The entire kingdom and the area around it is powered by Toads running on treadmills.
 * Peach and Bowser frequently fight over which kingdom Rainbow Road belongs to.
 * The Mushroom Kingdom is in Michigan. Lake Michigan, to be exact.
 * Michigan in this universe is bigger. For one, it's geographically bigger. So that includes the lakes. That's why the Mushroom Kingdom, and Bowser's Kingdom, can fit in the lakes. For two, the Mushroom Kingdom, and Bowser's Kingdom, are somewhat connected to Michigan. They are islands in the lake. Michigan owns the islands, but they don't share the same government. The two kingdoms are their own countries, that have their own government. While Michigan still has it's American government. Michigan is like a country, in a country because it's still a state, that has countries in it. Remember, this is in the universe of this show.