Grass Land

The first world of Super Mario Bros. 3. It has 6 levels, only one Hammer Bros., a fortress, and two Toad Houses. In level 3 and the fortress you can get two out of the three Warp Whistles in the game. Using both of them lets you take a short cut to world 8, Dark Land. Grass Land is the place where Larry Koopa, the youngest Koopaling is.

Level info

 * 1-1: Just a normal world
 * 1-2: A level where Mario can stomp Goombas repeatedly without touching the ground to get 1-UPs
 * 1-3: Cloud Land, Warp Whistle
 * 1-4: A side-scrolling level where Mario must collect at least 40 coins to get a White Mushroom House and receive a P-wing
 * Mini-fortress: Mario can use it to get another Warp Whistle
 * 1-5: An underground realm; contains Cloud Land
 * 1-6: Has a Troopa beneath the card to make it a challenge
 * Airship: Larry must be killed 3 times