This was a city. From the remains of the collapsed buildings, Zhang Tie realized that it was a medium-sized city.
As there was no road in front, they could barely access to it. The fluorite lamplight brightened up a part of the darkness. Through the indistinct mistiness, those ruined tall corridors were like a beast lurking in the darkness.
Some pioneers were seemingly wandering in the darkness. Holding green fluorite lamps, they looked like swaying ghost fire[1], which terrified Zhang Tie's team for some reason.
Feeling the tense atmosphere behind him, Zhang Tie switched his dark vision with the common vision and found that this ruined city was absolutely like a graveyard. It brought a great stress to humans. However, in dark vision, Zhang Tie could only see the desolate wildness.
Seeing those remaining tall buildings, Zhang Tie could sense the development of human civilization before the Catastrophe.
[1] Ghost fire, when humans or other animals die in the wild, the phosphor in their bones might react with water or alkali chemically, causing a fire. The fire would flow with wind. If you move, you might find being chased by them. In the wild, this is very terrifying, just like being obssessed with a ghost. Therefore, it's called ghost fire. This always happens in the graveyard.