A colossal magma metropolis built into a massive volcanic caldera, towering obsidian towers with flowing lava rivers cascading between glowing glass facades, suspended magnetic rail networks carrying workers above molten rock rivers far below, industrial cooling towers emitting steam through cracks in the caldera ceiling above, deep crimson and molten gold palette with intense orange illumination from the lava far below, epic downward shot with tiny silhouetted worker figures on maintenance platforms emphasizes impossible geothermal engineering scale, photorealistic, cinematic depth of field