Who'd have thought that the motions of the heavens themselves could be captured in the gears of engineering? This is pretty much the coolest frickin' thing I've seen in some time. Hopefully they'll produce a kit for this sometime soon.
The Antikythera Mechanism in Lego from Small Mammal on Vimeo.
If this floats your boat then check out Michael Wright's Antikythera Mechanism. You might also appreciate Kurt Hertzstark's beautiful Curta, and for fans of Lego, check out this Lego Babbage Difference Engine.