"Worst of all, the air was full of fumes; breathing was painful and difficult, and a dizziness came on them, so that they staggered and often fell. And yet their wills did not yield, and they struggled on."
The issue with Châtelet - aside from how crowded it is - is that it’s two stations masquerading as one, same as Montparnasse-Bienvenüe.
Once you know what’s on which side and that the directions in the main hall are purposefully made to have you meander for flow control and you can just cut through, it gets a lot more manageable.
I first looked at _regular_ stations, but once I understood that it was done by a single guy, I had to look at Paris' Mordor: Châtelet.
The 3D view looks like an ants nest, as expected.
Very impressed by the work done!