The moving castle

The Moving Castle is the home of Gamemaster Brown, the Nose, Howl and other residents staying for brief or extended periods of time. It is depicted in the movie by Hayao Miyazaki by the same name. The movie depicts the adventures Howl is having while the Nose and Brown are out on other adventures, and leave the castle to Howl while they are gone. It is a massive construction of houses and debris put together to form a hideous yet charming castle. It has legs and can cover large distances.

The inside of the castle is a labyrinth of hallways, doors and rooms. The room behind a door can change from time to time.

It is able to move because of the fire demon Kalcifer who Howl made a pact with when he was young.

Evergloom
Brown and his friend Emil created a miniature world called Evergloom inside the moving castle. When the castle was destroyed by the Skaven, the miniature was destroyed as well, so now the only way to get to Evergloom is by an impossible journey, as was a definition of the world.