I'm building a MASIVE pistonhouse underground and update it sometimes.

If you spawn you wil spawned in a weird control room choose pistonhouse to go to the pistonhouse and je will spawn in a dirt cave (this thins was builded to close to a other project of me thats why)


To go in the pistonhouse go behind the tree end you see some flowers near the flowers is a presureplate if you press that after a short time the lowerst block of the tree will open where u find a button if you press that button the stone wall will open.


if you are inside you see 4 paintings the second of the left is a hidden doorwair behind the painting (hard to find sorry for that) you find there a controlroom and you can open things 
(by the furnace room jou need to set a block in the furnace)


(by the chestroom you need to set a block in the upper left chest)
downstairs you will find a black hole there is a lever hided use that lever to open the doors behind the paintings 
and in the right painting you find a living room (with 2 hided buttons) on the right is a kitchen by the entrence of the kitchen you  need to trow a block on it and the glowstone will open itself 
GootLuck with finding the other hidenrooms ;) 


btw in the bathroom is a schouwer that needs a redstone clock and sometimes buggs the redstone timer (on multiplayer servers im not sure of its bugs to in singeplayer)