Portal

It is a place where Humans / Dragons travel to go to a The Sixteen Realms, the portal has a brown color.

Realms

 * Realm of Oni and Dragons
 * Ninjago
 * Underworld
 * Departed Realm
 * Realm of Madness
 * Chima
 * Cloud Kingdom
 * Djinjago (formely; destroyed)
 * Cursed Realm (formely; destroyed)
 * Grasslands (possibly)
 * 7 other unknown realms