Pluribus River

Pluribus River is an artificial river that completely encircles the Sphere of Assembly on Pluribus Unum.

While originally conceived as a circular lake with a large circular island in it's center, even before the start of construction there were some changes made to that plan.

The result is a "river" who's current is controlled by hundreds of pumps and small Arti-Grav projectors. It contains several thousand types of freshwater fish and plants, from at least 250 different planets.

Even though it's artificial, care has been taken to ensure that it looks "natural."