Lorule

Lorule is a location in. It is a dark mirror of Hyrule, reminiscent of the Dark World in. The land once kept its own Triforce, an inverted counterpart of the one in Hyrule. Lorule is accessed via portals in Hyrule. Most of Lorule's locations are isolated from each other by cliffs and large chasms. They must be reached by separate portals.

History
According to Princess Hilda, Lorule was once a land much like Hyrule. It possessed its own version of the Sacred Realm and its own incarnation of the Triforce. As was the case in Hyrule, the people of Lorule began to lust for their Triforce's limitless power. Many lives were lost as people warred over it. To end the strife, Hilda's ancestors decided destroy their Triforce rather than seal it. However, without its Triforce, Lorule slowly began to crumble. As the generations went by, Lorule fell further and further into disrepair and edged closer to its doom.

In, Hilda learns of the existence of Hyrule and its Triforce. Desperate to save her people, she conceives a plan with Yuga to steal Hyrule's Triforce, knowing it would condemn the land to Lorule's fate.

Yuga successfully captures all of the Seven Sages, including Princess Zelda (keeper of the Triforce of Wisdom), and, at Hilda's behest, eventually breaks the seal placed on Ganon's spirit so as to access the Triforce of Power he held. Fusing with the Demon King, Yuga fought Link but failed to defeat him, and in the midst of battle, betrayed Hilda and took from her the Triforce of Wisdom she had taken from Zelda as he had no interest in saving her crumbling kingdom and would rather remake it in his image. Energized by the Triforce of Power and the Triforce of Wisdom, Yuga once again battled Link in an attempt to take the Triforce of Courage from him, but was ultimately defeated by the young hero wielding the Master Sword. This released Hilda, who though shaken was ready to once again attempt to take the Triforce pieces from Link and Zelda, until Ravio, Link's Lorulean counterpart who had once served Princess Hilda before fleeing in cowardice, returns to talk sense into the princess and help her see that stealing Hyrule's Triforce would bring out the worst in Lorule. Finally brought to her senses, Hilda realizes her error and resolves to do the right thing alongside Ravio to return Link, Zelda, and their Triforce to their homeland, even if this meant the end of their own world. The pair took Link and Zelda to their world's version of the Sacred Realm and sent them home from there.

Once home again in their own world, Link and Zelda resolve to make a wish upon the reformed Triforce together to grant Princess Hilda and her world a parting gift. Back in Lorule's Sacred Realm, as Hilda and Ravio turn to leave and watch the dimming of their world, both are shocked and overjoyed to see their world's Triforce restored as a result of the wish Link and Zelda made upon Hyrule's Triforce, thus saving and restoring Lorule.

Trivia

 * "Lorule" is a pun on "Hyrule;" the first syllable, "Lo", contrasts the "Hy" in Hyrule (as in high and low).
 * A remixed version of the original Dark World theme plays in Lorule.