Superstar Road is a world in New Super Mario Bros. U and New Super Luigi U, after the player finishes the game. If the player gathers all the Star Coins in any other world, then he or she will have access to a level depending on which world. The Toad Houses in this world also contain items that could not be accessible before, the Propeller Mushroom and the Penguin Suit. It is a spiritual successor to the previous secret worlds and Star Roads alike. In New Super Luigi U, the Propeller Mushroom and the Penguin Suit are in regular levels as well.
The world has nine regular levels and four Toad Houses.