**NOTE**: I have release Cities of Earth 2 (https://mods.factorio.com/mod/CitiesOfEarth2) which doesn't need this mod. (I should probably deprecate both of them.) :) Mod that changes the world generation to be a map of Earth. This mod only overrides the generated tiles. Ore, biters, trees and other entities will still be randomly generated.
The Ruins Mod adds randomly spawns ruins in the world. These ruins are destroyed fragments of bases, forts, small oases, and more. Explore them for loot, adventure, or entertainment, but beware, some still have running defenses from the last player that landed on the planet, with more successful colonies having better defenses.