|World location||World 2|
|Previous level||World 1-Castle|
|Next level||World 2-2|
|Game(s)||Super Mario 3D Land|
World 2-1 is the sixth level of Super Mario 3D Land.
World 2-1 features a large white castle, which is accessed about halfway through the level. Mario traverses several small plains containing mostly Goombas in the beginning parts of the level. This is also the first level in which cardboard enemies/items appear. They serve only as a distraction to Mario. Up the castle, several platforms move about and Mario must climb the wall to the top. A block that teleports Mario to the top of the castle leads to the end of the level. By using a switch to make a collapsing bridge, Mario makes his way to the Flagpole and thus the end of the level.
Enemies that appeared in World 2-1: