MARS
But Mars was never truly a great location to colonize. It couldn't hold a survivable atmosphere. Its resources were trapped at the bottom of a gravity well. It would take thousands of years before humanity could walk on the surface of mars unaided... if it ever happened.
While such things would cause Humanity's best and brightest to focus on other locations, Humanities wealthiest were focused on the Red Planet. Over the centuries, habitable domes have been constructed, tunnel cities have burrowed under the Martian surface, and a mostly service economy has been created around supporting the population. Mars has earned a reputation as the place to live for the ultra-wealthy, but its status as the most important of humanity's colonies has long sense been eclipsed by more profitable ventures in the solar system and beyond.
Mars also once stood as the political center of Humanity. The sprawling complex on Olympus Mons hosting embassies from all major space-fairing powers within the Human Sphere. The events of the Olympic Summit of 2321, with the Tian Zao Gongheguo placing the Daqin empress under arrest, would lead to a loss in trust of Martian leadership. The Olympic Summits never recovered in importance or attendance.
Continents and Landmarks
The surface of mars looks much the same as it has for millions of years, icy polar caps and dry red deserts cover the entire surface. There have been a few domed cities created that cluster together on the surface of the planet, often providing green spaces for people to enjoy. Most of the population of Mars lives underground in sprawling tunnel cities that are buried deep enough to protect against radiation.
excerpts from RP
-- Fortune Favors Chapter 2: Gathering
-- Vows of the Olympians Chapter 2: First (Re)Contact
-- Vows of the Olympians Chapter 3: The HFR Connection