Human: Write a detailed description of a foreboding setting with niches, tables, and a domed ceiling. Assistant: 
Transitioning from narrow tunnels to wide open spaces, this section of the sewer bears an egg-shape and a domed ceiling, the height of which is difficult to ascertain. Glowing white stones are fitted into niches high above and provide a soft illumination for the water-dampened confines. Strange blocks jut out of the wall at varying heights, some of which form odd stone tables while others provide functional seating.