Jacob's Cabin is an old wooden house where the mysterious Jacob lives. It is surrounded by a circle of a gray ashy substance. The cabin was most likely built sometime in the 1800s, based on its style and technology. Inside is a rocking chair, a shelf of jars, and a portrait of a dog.

Ben showed Locke the cabin, and Jacob. At first, Locke believed Ben had gone insane. Once inside, Locke saw Ben talking to Jacob, yet Jacob was invisible. Locke is about to exit the cabin when he hears a voice saying "Help me". Locke looks back asking Ben what he said. Ben looks worried, for he had not said anything. Locke turned on a flashlight, and Jacob got mad. For a second, Jacob can be seen, sitting on the rocking chair.

After Hurley got lost in the jungle, he found the cabin. He looked inside, and saw Christian Shephard inside. Suddenly, he saw Jacob's eye in the window. Hurley ran away, and concentrates, hoping the cabin will disappear, which it did.