Giant Land/Big Island
An image of the location.
Series Mario series
First game Super Mario Bros. 3

Giant Land AKA Big Island is the fourth world found in the NES classic Super Mario Bros. 3 for the NES. The entire world, both live creatures, blocks and pipes, are all larger than normal excluding Mario and Luigi. During the events in the game, the entire area was taken over by Iggy Koopa after transforming the original king into a dinosaur (Donkey Kong Jr. in the remakes). After defeating Iggy, Mario and Luigi save the king, and everything, in that world at least, goes back to normal.