Geo Thermal Vent
The Geo Thermal Vent occurs naturally on some planets. It is a great source of clean energy that doesn't cost a plot.
Library of Jith
It is said that the Great Race is also the first race. And that they constructed experiments to alter themselves to form a more perfect race. And the records of those experiments are contained in the Library of Jith.
Temple of the Drajilites
It is said that the ancient Drajilite clerics could see the heavens above them through their rituals. Tablets found around the Expanse hint that if one were to uncover the ancient Temple of the Drajilites then one would possess their power.