If you ever have the occasion, take the subway in Moscow. Apparently, you can meet, see, and possibly talk to a [wide variety of people] that you cannot find anywhere else except maybe somewhere else.

Of course, the subway stations are supposed to be almost monuments of grandeur in themselves, but really, people-watching is where anything interesting has ever been at.

So talk about the link and the people photographed within, the strange encounters you have had on public transportation systems with preference to subway trains, subway stations, Russia with a particular focus on Moscow, and/or people-watching in general.