mars river bed
I know there have been many dried up water channels photographed on Mars but I think this ESA video is extraodrinarily beautiful;-
http://www.esa.int/SPECIALS/Mars_Express/SEMWGVM65LE_0.html
From Libya Montes ( I lived in Libya -earth- a long time ago and these images would fit right in, its kind of desolate on both planets). Apparently this river carried as much water in its day as the mid reaches of the Mississipi.
