Tree Door

This hidden door can only fit in a 4x4 tree (that is one huge tree!), but it still looks amazing! If you make other huge trees near this one, this door can be practically unspottable.

The tricky part for this build is setting up the repeaters just right to make the double piston extender (DPE). It was also tough to set up the obsidian so that the slimeblocks don't attach to anything extra.

The lever in the room can close/open the door as well. I had to use an XOR gate to hook it up correctly.

This is a good place to store all your goodies!