The Forbidden Fortress (also called The Forbidden Mountain) is the location of Maleficent's true childhood home. The Forbidden Fortress is located on the Isle of the Doomed.
The Gargoyles guard a bridge, once awakened they ask multiple question which when answered cause the bridge to reconstruct itself. On their adventure to the Forbidden fortress, Carlos is quizzed about his mother, and successfully answered all the questions.
Wall of Thorns
The thorns are another deterrent, Jay fortunately has brought a machete, two silver knives and a can of bug spray. Jay gives the bug spray to Carlos and the knives to Mal and Evie. He proceeds to hack a path while Evie and Mal slash at branches of thorns