This Building was orrigionally built by my friends and i back when the end was fairly new on our old movecraft server. It includes an end portal, a 3x3 redstone piston door, and a movecraft hanger. This building is perfect for those evil scientist types.

If the door is closed and you find yourself outside the button is hidden behind the lava fall on the right side of the door. the best way to get it is to crouch and look up slightly it may take several tries to open the door.