Santa Maria was a planet discovered by accident when a jump went bad early in human space exploration. It was rediscovered 300 years later by Col.Ray Longknife and the crew of the Second Chance after a bad jump, resulting from malware left in it's operating system. It was home to a "nature preserve" left by the Three with a sentient computer "caretaker" left to watch over it.
The Human settlement was on the smallest continent, about the size of Australia, laying to southeast of the largest continent. Separated from it by a large archipelago of islands and two or three wide channels.
It had three major cities New Haven, Richland and Lander's Refuge.