Ninjago Island

Ninjago is the world that was created by The First Master of Spinjitzu using the Four Golden Weapons.

Geography
Ninjago is home to a very diverse geography, with rocky locations such as the Caves of Despair and the Frozen Wasteland. It contains a mountain range known as the Mountains of Impossible Height, and Floating Ruins. Two volcanoes are known to exist, one containing the Fire Temple and the other having the highest tempature in all of Ninjago, Torchfire Mountain. It has The Toxic Bogs, which is a toxic swamp, a desert which is home to the Anacondrai tomb, and The Lost City of Ouroboros, as well as the only known city in Ninjago, Ninjago City.

Notable Locations
The Caves of Despair

The Frozen Wasteland

The Floating Ruins

The Mountains of Impossible Height

The Fire Temple

The Monastery of Spinjitzu (Destroyed by Serpentine)

The Forest of Tranquility

4 Weapons Blacksmith Shop

Torchfire Mountain

The Underworld

The Lost City of Ouroboros

The Toxic Bogs

Ninjago City

Mega Monster Amusement Park

Marty Oppenheimer School of Performing Arts

Mountain of a Million Steps

Ed and Edna's Junkyard

Golden Peaks

Darkley's Boarding School for Bad Boys

Inhabitants
Ninjago is home to a variety of inabitants, including Ninja, Farmers, and Blacksmiths. The existence of Samurai is also hinted at.

Trivia

 * Sensei Wu tells the ninja that Ninjago was made by his father, giving Ninjago two generations to develop. The development of Ninjago is impossible in such a short time, unless the First Spinjitzu Master created Ninjago in it's present form or generations of Ninjago citizens are much longer than human lifespans in reality.