If you can find this Door in the main dimension and you make the choice to walk through it you will find a realm that transcends the rules of logic, rules, and physics. A realm where anything is possible a realm where magic is real. A realm where the cactus will attempt to eat you, and the bunny rabbits explode like Creepers. Yup, this is the place for a vacation. Sorta.
Deep within the Twilight Zone's forest. A tall mangled tree lifts toward might be called a sky. Kinda. On top of that tree lies a Victorian Mansion. This is where the Mad Hatter resides. Deep within the ever changing mansion. Outside the mansion the sounds of the Peanuts themes song play through a window. Inside the mansion a top hat lies on a rack and a rapier lies on the floor in its sheath. By a crackling fireplace, The Mad Hatter sips a cup of coffee and reflects on the state of the universe, "I wonder should I go out? Everything seems to be in a state of Chaos. I probably should. Sigh, Welp. I guess I will." The Mad Hatter snaps his fingers and takes another sip of coffee.
This universe splits into a series of stringed together pocket dimensions no longer connected to the Mad Hatter or his ship. It is possible to enter via certain Doors though.