World 3 (Super Mario World 2: Yoshi's Island)

World 3 is a world in the game Super Mario World 2: Yoshi's Island and its remake Yoshi's Island: Super Mario Advance 3. It is a jungle-based level. Its mid-boss is Prince Froggy; its main boss is Naval Piranha. Its extra level is Extra 3: More Monkey Madness; its secret level is Secret 3: Go! Go! Morphing!. And its bonus level is Drawing Lots. Although almost all the levels are jungle themed, there is one level titled The Cave Of Harry Hedgehog, which takes place in a cave.

Trivia

 * The level point of 3-5 on the map is surrounded by cave-like terrain, even though 3-5 is not a cave level. 3-6 is a cave level and its level point doesn't have that terrain surrounding it. Similarly, 3-3's level point also has the 'cave', but it isn't a cave level either. This could mean that the levels in World 3 were originally going to be in a different order, or that other ideas were going to be used for those levels.