mainly of dark, grey, concrete maintenance tunnels, stretching on for millions of miles. The walls are lined with pipes and occasionally ventilation ducts, which often contain a thick viscous black liquid

This image shows a seemingly endless network of dark, grey concrete maintenance tunnels. Pipes and ventilation ducts line the walls, some containing a thick, viscous black liquid.

Created by Brenon on Oct 16, 2021 using the Artistic AI image generator model.