The largest feature on Mars is so vast that it isn't normally visible: the Northern hemisphere is quite a bit lower than the Southern (1 to 3 km): https://en.w

The largest feature on Mars is so vast that it isn't normally visible: the Northern hemisphere is quite a bit lower than the Southern (1 to 3 km): https://en.wikipedia.org/wiki/Martian_dichotomy https://en.wikipedia.org/wiki/Martian_dichotomy Edit: Very obvious in Google Maps Mars: https://www.google.com/mars/ https://www.google.com/mars/