The Forest is a location featured in the film Sleeping Beauty. It is where Flora, Fauna, and Merryweather's cottage is located and where Prince Phillip and Princess Aurora meet for the first time.
Kingdom Hearts: Birth By Sleep
The forest appears in the game as one of the areas of the Enchanted Dominion world. It is here that Terra first enters the world, encountering the Unversed and pursuing them to King Stefan's Castle.
The forest appears as part of the Sleeping Beauty transition level toward the end of the game.
The forest in one of the concept art.