Woodland Mansion

A woodland mansion is a massive systematically-generated structure found only in dark forests and their hill variants. A mansion is inhabited by evokers and vindicators, and is one of the few places where a totem of undying can be obtained. Besides the aforementioned illager mobs, a mansion's interior lighting is sufficiently low for common hostile mobs such as zombies and skeletons to appear.

Generation
Woodland mansions typically generate far from the spawn point, often appearing thousands of blocks away. They can be located with woodland explorer maps, which are obtained from cartographer villagers, but they may not always point to the nearest one. The nearest woodland mansion may also be located via the command enabled by cheats. A dark forest biome with a woodland mansion is even rarer than a mushroom fields biome.

Like most randomly generated structures, woodland mansions can be found more frequently in a world using the Large Biomes world type, which has a greater chance of generating dark forests large enough for the required 32 blocks of dark forest to surround the center point of the structure generation.

Structure
Although their exact structure varies, all woodland mansions have some things in common: they all have three floors with a variety of rooms, and generate a cobblestone foundation underneath the entire structure. The top floor is about half the size of the lower floors. Each mansion includes a large foyer that leads to the corridors connecting the rooms.

Rooms
Any woodland mansion contains many types of rooms, but because the layout is randomly generated, some room types may not be present. Furthermore, certain rooms within the mansion are not readily accessible – some may have sealed entrances, while secret rooms have no entrances at all.

One may access the individual structures of a woodland mansion by using structure blocks to manually load room structures from the  folder in minecraft.jar. To do so, set a structure block to Load mode, enter, and press LOAD. A list of possible rooms, the names of these structures, and small descriptions are provided in the table below. Note that the room names are conjectural.