With the upcoming 1.11 Exploration update, there will be some new features added, including a new type of structure: Woodland Mansion (already available in the snapshots).
What is a Woodland Mansion - do any mobs spawn in/aruond it? Where can I find it?
Some specifics of Woodland Mansions:
It is a massive structure, up to cca. 65x65 blocks wide and 30 blocks high. It consists of three floors (the third is spaller) connected by a central staircase.
It can be found in Roofed Forest biomes, and is very rare - I made a test using the command /locate and calculated the average distance from 10 worlds: In average, the Mansion is located 15000 blocks away from spawn. But, luckily, the structure is so big you won't miss it when passing by.
The Mansion is home to Illagers, which have two variants: Vindicators and Evokers. Both are hostile, and Evokers can also spawn Vexes.
It consists of different types of rooms, usually with one entrance, eg. hallways, staircases, dinner rooms, etc. Because the Mansion is procedurally generated room by room, some rooms may have no entrances, or multiple entrances. Each room (except the staircase) takes up the same space - 7x7x7 blocks, discluidng the walls, floor and ceiling (which render after the rooms, accordingly to the rooms around them).
It can be located using the /locate command or with a Exploration map. A woodland explorer map can be bought from a cartographer Villager for 16-28 Emeralds and a Compass
When exploring in survival mode, be aware that the Mansion from inside is very hostile and easy to get lost inside. Getting lost inside the Mansion will often result in death (and loss of items).
Some screenshots:
The Mansion from outside:
The entrance hallway with the staircase:
Good luck exploring!
