The main hole was built in less than a week due to a very amount of free time XD Every block was mined hand by hand and all the decorative blocks are legit. At the top of the hole there is my most important home, than a Morse Receiver (from a giant redstone structure that doesn't matter now), and than the panel control of the hole.

The first floor is a S.O.S. morse signal... the final hope for me, stranded donnowhere.
The second floor is a mysterious chamber of diamonds!!!1
The third floor is the Mob chamber, dedicated to them.
At the bottom there is the descendant nether.