Curvalicious!

This artwork, made by Henk Ovink in 1996 is called "De brachistochroon" (the Brachistrochrone) and is inspired by the Brachistochrone curve (you don't say, captain obvious).

More information on the artwork itself on the R.U.G. website (if i parsed the url correctly you'll get the english version, otherwise you'll have to switch languages manually)

More interesting maybe is the wikipedia page on the brachistochrone curve, or even better: check it out on mathworld