This is an TNT-proof underground bunker, designed for maximum lifetime without external support.
The Bunker includes various rooms, starting from the central shaft, which is four floors high.

First Floor
Entrance with air-locker, Command center, Controls for central Illumination and Section Isolation, Jail, Execution room, High security Treasure room,

Second Floor
Crafting Room, Chest Room, Kitchen, Medical center, Surgery, little Library, Light room,

Third Floor
Wheat Plant, Seed Room, Tree Plant, Multifunctional Plant,

Fourth Floor
Single Chambers, Crew's Quarter, Pool, Shower, Cinema and Presentation Lounge, Library,