Vibrant, detailed, and minimalistic illustration of an underground sewer with smooth walls, a curved tunnel-like sewer, a pipe forming a straight channel in the ground where small pools of water form within the pipe. The background is a striking black in contrasting shades of bright blue and crisp light blue, evoking a sense of depth and dimensionality. Pools of water can be seen on the ground, reflecting the dim light. The atmosphere is meant to be dark and gloomy, with dim lighting creating deep shadows.