Another Impossible Object for you! Do you notice anything strange with these doors? I would like to meet a guy or a gal that is capable of constructing these doors! If you’re an expert, then let me give you a harder assignment: after solving impossible safe doors, try constructing artifact from hell! If this is too was little too hard, maybe you should start with impossible flow meter. After seeing them all, If you still think it can’t be done, just look how this guy created some! Another architect made some similar stuff. Hundreds of examples can be found inside Impossible objects category, in my sidebar. Check it!