This image captured by NASA's 2001 Mars Odyssey spacecraft shows a portion of Hebrus Valles. The flow of liquid (water or lava) is from the bottom of the image into the circular feature, which was likely filled by the material from the channel.
The hills in this image seen by NASA's 2001 Mars Odyssey spacecraft are part of Tartarus Colles. Several of the hills have dark slope streaks, believed to be formed by downslope removal of dust revealing the darker rock beneath.
This image from NASA's 2001 Mars Odyssey spacecraft shows a small portion of the lava flows from Alba Mons. The depression and collapse features within it are part of the large system of tectonic features created by the apparent collapse of the volcano.
This image from NASA's 2001 Mars Odyssey spacecraft shows a small region between Olympus Mons and Sulci Gordii. There are lava flows, tectonic depressions and channels visible in the image. All the features are related to the volcanism.