Iggy's Castle

Iggy's Castle is the first castle in Super Mario World, found at the end of Yoshi's Island. There is a climbing section in the castle that goes horizontal and is featured again in Ludwig's Castle, but it is going vertically in the fourth castle. The next section introduces Skewers, but their crushers are flat. When you reach the Boss Door, you will find Iggy Koopa himself. On his defeat, the first Yoshi Egg is saved and Mario successfully destroys the castle and goes to the second world, Donut Plains.