A strange ridge that baffles scientists rises near the equator of Saturn's moon Iapetus is seen in this photo taken during a fly-by of the Cassini space probe. Clearly, however, this is a remnant of a past space elevator cable break. (Readers of Kim Stanley Robinson's Mars Trilogy - or at least the first two as I have - will get the reference.)
Wonder if its one of those deals where an impact broke the thing in half and it's put itself back together. Interesting photo though.