All of Mars . ... Credit: National Geographic Society , MOLA Science Team , MGS , JPL , NASA Explanation: From pole to pole , from east to west, this is all of Mars . ... Particularly notable are the volcanoes of the Tharsis province , visible on the left, which are taller than any mountains on Earth. Just to the left of center is Valles Marineris , a canyon much longer and deeper Earth's Grand Canyon . ... Mars has many smooth lowlands in the north, and many rough highlands in the south. ...