World 2 (Super Mario 3D Land)

World 2 is the second world explored in Super Mario 3D Land. This world is a yellow field with blocks, hills and a mountain in the background. It has five levels, a Mystery Box, and a Toad House. The boss of this world is Boom Boom.

Mystery Box
The possible contents of this world's Mystery Box are:
 * A Fire Flower, a Goomba Tower, two Goombas high, and a Venus Fire Trap. Defeating the enemies causes 15 Coins and a Star Medal to appear.
 * Two Venus Fire Traps and a Fire Flower. Defeating the Venus Fire Traps causes 15 Coins and a Star Medal to appear.
 * A golden Mystery Box containing nine Goomba Signs, five of which contain 1-Up Mushrooms and the others, Coins, a Fire Flower, and two Star Medals.

Enemies introduced

 * Bullet Bills
 * Coin Coffer‎s
 * Rocket Engines
 * Rocky Wrenches
 * Stingbys
 * Tail Bullet Bills
 * Boss: Boom Boom

Trivia

 * The secret area with the coins in the shape of "3D" may be a reference to a secret area in Super Mario Bros. 3 where the coins are in the shape of the number 3.
 * When Mario completes World 2-3, the original winning tune from Super Mario Bros. is played. This also plays at the end of Special 1-3.