Duchy of Lantern Waste

Location of Mr. Tumnus's cave and the entrance into Narnia from the Wardrobe.

The Tree of Protection was planted by Digory Kirke in Lantern Waste to keep Jadis out of Narnia.

Stabble Hill is in Lantern Waste, which is where the final battle of Narnia was fought.

We learn in Prince Caspian that King Edmund Pevensie is "Duke of Lantern Waste"