City of Ghosts
The "City of Ghosts" event in Stellaris — flavor, choices, and how to trigger it with the event console command.
City of Ghosts

Our surface expedition has reported back some astounding findings. The planet has multiple major cities, all abandoned but in quite good shape considering their age. The infrastructure and urban planning of each city is remarkably structured and harmonious, indicating a highly cohesive civilization driven by centralized, collective ideals - perhaps even a gestalt consciousness of some kind. Based on the architecture and interior fixtures, the species that built all this seems to have been small fungoids, with a fairly low state of technical advancement. Where exactly they all went remains unknown.
The command below will trigger the "City of Ghosts" event in Stellaris:
Player choices
When this event fires, you can choose between the following option:
- Keep digging!