This image, taken by the High Resolution Stereo Camera (HRSC) on board ESA’s Mars Express spacecraft, shows part of the Medusa Fossae formation and adjacent areas at the highland-lowland boundary on Mars.

The HRSC obtained this image during orbit 917 with a resolution of approximately 13 metres per pixel. It shows an area located at about 5º South and 213º East. The colour image is derived from the three HRSC colour channels.
The Medusa Fossae formation is an extensive unit of enigmatic origin found near the Martian ‘highland-lowland dichotomy boundary’ between the Tharsis and Elysium centres of volcanic activity.