The Hippo Zone is a small level in the video game Super Mario Land 2: 6 Golden Coins. It isn't fully a zone, but it is an important level nonetheless. It is found on top of a hill on the main map. Mario must complete the Hippo Zone to reach the Space Zone.
The Hippo Zone consists of a Hippo that blows Bubbles which Mario can hop into and fly with. The Soap Bubbles allow Mario to float as high as he wants and will only pop if touched by an enemy. Therefore, Mario can fly through the whole level and even reach the Bonus. In order to reach the Space Zone, Mario must take the top exit in the bubble, as it is impossible to reach without a soap bubble. Furthermore, if he takes the bottom one, he will return to the main map, just to the right of the Macro Zone, directly under the Space Zone.