I painstakingly made an evil lair in a survival Minecraft server. And it's still not done.
The exterior.
The entrance can be covered up to prevent intruders.
The lobby/ lounge area. The iron door has a stairwell leading up and down.
The top floor (eyes) where we have drinks and conduct evil meetings on world domination.
The lever which controls the door.
I have an underground portion of the lair where all farms and storage will go but it's not done yet.