Portion of the global topography of Mars from the Mars Global Surveyor (MOLA) and Mars Express (HRSC) spacecraft (source: https://astrogeology.usgs.gov/search/map/Mars/Topography/HRSC_MOLA_Blend/Mars_HRSC_MOLA_BlendDEM_Global_200mp)
This section is the southern hemisphere (0° - 88° S) from longitude 270°E to 360°E, 10x vertical exaggeration.
The large impact in the center of the model is the Argyre Basin, and Valles Marineris is the large canyon at the north part of the model.