Forbidden Mountain

The Forbidden Mountain is a dangerous mountain region where Maleficent's Castle is located and it is home to the evil enchantress Maleficent, her pet Diablo, and her Goons.

Description
The Forbidden Mountain is a range of mountains with a ruined castle at its peak that serves as Maleficent's home. The surrounding sky is generally pale green in color and the entire area has a dark atmosphere. The Forbidden Mountain is thought to be one of the gloomiest and darkest places to live.

Sleeping Beauty
Maleficent lived in a eerie castle within the Forbidden Mountain throughout her life, ruling over her own subjects, harnessing her dark magic, and scheming against King Stefan and his daughter Aurora.

When her goblin soldiers reported back to her about Princess Aurora (only they were searching for a baby) with no such luck, she became frustrated and ordered them to leave her in her throne room. She and her pet Diablo take matters into their own hands and left Forbidden as they went to find Aurora and complete her dreaded curse of permanent sleep upon the unsuspecting princess on her 16th birthday.

The mountain is also the place where Maleficent kidnapped Prince Phillip and locked him in her dungeon, in order to prevent him to rescue Princess Aurora and break the spell. The Three Good Fairies however, manage to sneak inside the castle and rescue him. They give him the Sword of Truth and the Shield of Virtue as he will encounter many dangers ahead.

When Maleficent finds out that Prince Phillip has escaped, she does everything she can to prevent him from reaching King Stefan's Castle.

Once Upon a Time in Wonderland
The Forbidden Mountain make's an appearance in Once Upon a Time in Wonderland. It was were the Looking-Glass of Wonderland was held.

Trivia

 * In The Black Cauldron, the Horned King's Castle is similar to the Forbidden Mountain.