This should be the gameplay in Civilization, instead of the thing where you train and archaeologist who goes to excavate magically known locations.
Excavation of tunnels and such should just come with a chance of finding artifacts, but it only materializes with the right culture tech unlocked (before some point, buried treasures were just scrapped or sold, not put into museums).
Excavation of tunnels and such should just come with a chance of finding artifacts, but it only materializes with the right culture tech unlocked (before some point, buried treasures were just scrapped or sold, not put into museums).