(ancient lost technology, megalithic melting architecture  underwater favelas city, many hang bridges crossing the sky, with large pillars surrounding  the river styx flowing,  glowing at night with caustics refractions, and volumetric light shafts, width a ancient mega creature lurking bellow the surface of the river , with the souls and spirits haunting the  shadows)
[:philippe druillet:25] [:crowded:5] [:detailed architecture :10]