Pipe Maze

Pipe Maze (known Pipe Land) is one of Mushroom World kingdoms served as is the seventh world in Super Mario Bros. 3 and sixth world in New Super Mario Bros. Wii.

Apperance
As the name implies, this kingdom is full from Pipes everywhere inhabited by all type ofPiranha Plants. The kingdom have many different landscapes include: plains, deserts, hills, seaside and rock mountains; but the main landscapes that kingdom is plumbings and caves.

History
In third game, Mario and Luigi discover which this labyrinth kingdom is conquered by one of Koopalings Ludwig von Koopa who turns the king into a Piranha Plant (a Yoshi in the remakes) to be save by plunders.

In New Super Mario Bros. Wii is revealed which that rock mountains they're part of Pipe Maze evidenced by green plumbings with Piranha Plants. This game, Mario and his friends faced with Bullet Bills where are attack in map, fight with Morton Koopa Jr. in two fotress and enter in airship.

Super Mario Bros. 3

 * 7-1
 * 7-2
 * 7-3
 * 7-4
 * 7-5
 * 7-Piranha Plant 1
 * 7-Fortress 1
 *  7-6
 * 7-7
 * 7-8
 * 7-9
 * 7-Fortress 2
 * 7-Piranha Plant 2
 * 7-Airship

New Super Mario Bros

 * 6-1
 * 6-A
 * 6-2
 * 6-Tower
 * 6-3
 * 6-4
 * 6-Tower 2
 * 6-5
 * 6-B
 * 6-6
 * 6-Castle

New Super Mario Bros. Wii

 * 6-1
 * 6-2
 * 6-3
 * 6-4
 * 6-Tower
 * 6-5
 * 6-6
 * 6-Cannon
 * 6-Castle
 * 6-Airship

Other Areas Implied to be in the Kingdom

 * Piranha Plant Slide (Mario Kart 7/Mario Kart 8)
 * Banzai Bill's Mad Mountain (Mario Party: Island Tour)