C278 Sewers in France

Speaking of France, what was their first impression of him? Maybe the Louvre, the Eiffel Tower, the Arc de Triomphe... and a series of miracles of the world, but maybe you didn't know that the Paris's sewer system was one of the miracles that French was proud of.

The sewer system in Paris was an underground maze, and it had the only sewer museum in the world. Every year