a massive underground fortress standing in the wasteland

A colossal underground fortress—Dawn City—stands atop this wasteland. Its main structure is built from heavy metal and concrete, its surface marred by the scars of time and war. Sparse ventilation shafts and energy collection devices dot the fortress's roof, with faint rays of light struggling to pierce through the dust and sand, casting a dim glow on the city walls. This final refuge for humanity, though resilient in its resistance against the harsh external environment, teeters on the brink, constantly facing the challenges of survival.