Wyjeski
The Isle of Wyjeski is one of the major 6 isles, it mostly comprises of abandoned and decayed urban sprawl, some overrun with nature, others fully flooded, others gone to UV radiation and the isle is mostly full of heatwaves.
Additionally, Wyjeski is full of ruins of transportations, train tracks, roads, airports, many people live out of non-functional ancient vehicles.
Acid rain showers are also decently common, causing infrastructure and structures to only be constructed out of anti-corrosive materials.