I think I may have been to that train station.

I walked through a place that, at first, I thought was a regular metro station. But then it just kept opening up more and more, into more and more spaces. It was like a mall. I guess it was like an airport terminal. Businesses all over.

When I finally left it, I thought I was underground and then turned a corner and there was open daylight, no door, not even a wall just like the opening of a huge cave.