has rubble. i don't think it is too far from the tomb puzzle, but it's been a while. the key point i did not mention is that if you do not take it down with you first thing, then the door closes behind you and you cannot go back for the rubble after you are inside. the reason the door closes behind you is that you need to take in the piece that otherwise might be holding the entrance door open. that type of thing is typical of the puzzle. it is not just a question of opening doors and leaving them open. you absolutely do not have enough rubble 