The Mushroom Kingdom is the primary setting of the Mario franchise. It is ruled by Princess Peach, and its appearance changes from game to game. Despite this, the kingdom consists of many similar recurring landscapes, such as plains, deserts, islands, forests, mountains, snowy areas, and volcanoes.

The above text is from the Super Mario Wiki and is available under a Creative Commons license. Attribution must be provided through a list of authors or a link back to the original article. Source: https://www.mariowiki.com/Mushroom_Kingdom