Impossible sculptures
Alex Z
Photographer from Austria Alex Z created two photos of impossible constructions. The first is impossible junction of two hexnuts with a nail. The second is an impossible triangle constructed from dices. Also you can see photo of similar impossible triangle Donald Martin.
Artist's fotocommunity profile.
Images sources
http://www.fotocommunity.de/pc/pc/mypics/621207/display/9042593
http://www.fotocommunity.de/pc/pc/mypics/621207/display/8930722