The Sixteen Realms

The Fourteen Realms, once referred to as the Sixteen Realms prior to the destruction of two of its dimensions, are a variety of worlds and dimensions parallel to Ninjago, which could be transferred via the Realm Crystal, an artifact that was located in the Tomb of the First Spinjitzu Master. Following the apparent destruction of the Cursed Realm after The Preeminent was destroyed, along with the destruction of Djinjago, there are currently only fourteen realms In the series, the realms act as the ultimate setting for the events that take place.

Known Realms

 * Ninjago


 * Chima
 * Underworld
 * Cloud Kingdom
 * Dark Realm
 * Cursed Realm (Destroyed due to immense flooding from the Endless Sea)
 * Djinjago (Destroyed in consequence to the destruction of the Cursed Realm)
 * Departed Realm

8 other unknown realms

Realm Passageways
Despite being of different dimensions, the Sixteen Realms have multiple passageways and networks that can be used to access each other, with some forming naturally, and others having to be conjured.
 * Realm Crystal (All)
 * Being overloaded by the Golden Weapons (From Ninjago to Dark Realm; Transformed into Mega Weapon by Garmadon)
 * Traveler's Tea (From Ninjago to Dark Realm, vice-versa)
 * Dragons (All)
 * Blind Man's Eye (From Ninjago to Cloud Kingdom, vice-versa)
 * Book of Spells (From Ninjago to Cursed Realm, vice-versa; Destroyed by Lloyd)
 * Fire Temple (From Ninjago to Underworld, vice-versa; Destroyed by Flame)
 * Death (From Ninjago to Underworld/Cursed Realm/Departed Realm; Cursed Realm destroyed by Nya)
 * Mountain of Madness (From Dark Realm to Ninjago)
 * Skulkin Vehicles (From Underworld to Ninjago, vice-versa)
 * Magic (All)
 * Allied Armor of Azure (All; Destroyed by Nya)
 * Unknown 'Back Door' (From Ninjago to Cloud Kingdom)
 * The mouth of The Preeminent (From Cursed Realm to current location, vice-versa; Destroyed by Nya)
 * Yin Blade (All; Destroyed by Cole)

Trivia

 * The concept of the Sixteen Realms is similar to the Multiverse concept in various other fantasy and science fiction franchises. Notably, the fact that Chima is one of these worlds indicates that the Ninjago and Chima franchises share a Multiverse, though whether worlds based on other LEGO properties are also present is unknown.
 * Following their defeat at the hands of Captain Soto and his crew, the Sky Pirates were separated into various different realms, several if not most of which have not been featured or named in the series before.
 * Consequently destroying a realm could destroy its sister counterpart.
 * The Sixteen Realms are surrounded by a infinitely vast, formless void, known as the Ethereal Divide