The Ever Realm is a parallel world that is magical in nature, and contains medieval/fantasy elements as a part of its culture. It is the world that Sofia the First and Elena of Avalor take place in.
The Ever Realm is a fairytale-like realm. While similar to our planet Earth, its key characteristic is that magic constitutes a major role in the structure of the Ever Realm's civilizations and wildlife. All magic in the Ever Realm comes from the Mystic Isles. Most of the cultures of the Ever Realm are kingdoms governed by a monarchy. In addition, some kingdoms occupy the same area (such as the Tri-Kingdom Area between Enchancia, Khaldoun and Wei-Ling) and have formed strong ties to the point that there are social festivities for celebrating the kingdoms' relations.
One of the realm's earliest civilizations included Maru, whose people practiced some of the most powerful forms of magic in the Ever Realm. They were also responsible for creating magical artifacts such as the Amulet of Avalor, the Scepter of Light, and the Codex Maru. One day, Maru vanished without a trace, and the Kingdom of Avalor rose in its place.
According to Admiral Hornpipe, there are seventeen seas.
Wildwing Valley - A forest valley that is a haven for enchanted beasts like flying horses.
The Ever Realm is slated to have 140 kingdoms. However, according to Princess Hildegard, there are 138 kingdoms.
It appears that the Ever Realm is home to alternate versions of Disney characters, as characters such as Merlin and Flora, Fauna, and Merryweather are shown to be inhabitants of the realm. It is implied by Winter and the powers of the Amulet that the princesses also come from this realm, though Cinderella's statement suggests that not all of them may come from the Ever Realm since the Amulet can summon "all princesses that ever lived".
Ever Realm is a nod to the phrase "Happily Ever After".