The massive Valles Marineris canyon has been revealed in stunning new images taken by the European Space Agency's Mars Express. At 2,485 miles long, over 124 miles wide and more than 4 miles deep, the Red Planet's canyon makes America's seem downright puny by comparison - Valles Marineris would span the distance from the northern tip of Norway to the southern tip of Sicily. The new image depicts two trenches, or chasma, that form a portion of the western part of Valles Marineris. The picture uses data from the High Resolution Stereo Camera (HRSC) onboard Mars Express and it is a'true color' image, meaning it shows what would be seen by the human eye if looking at this region of Mars. The Red Planet's massive canyon has been revealed in new images released by the European Space Agency.