The geography-cartography-topography of the planet Mars (which took me ageeeees to complete)! You can see the whole project here.
I wanted to show the striking dichotomy of the Marsian surface (the two hemispheres differ in elevation by 1 to 3 km). While the northern one-third is relatively flat and lies below the conventional ‘zero elevation’ level (aka the “sea level”, only there’s no ocean to evaluate), the southern hemisphere is mountains and highlands heavily cratered. Plus there are large river valleys and outflow channels cutting through the separation. Our deserts are quite boring in comparison!