1. The Metro trains all run by themselves. They are machines-- no train driver/conductor- nothing!
2. The toilets are specific. The button with the half circle is a quick flush, the button with the full circle is a long flush...you get the point. I guess it's a European thing, because I saw it in London too. It's kind of like Japan, but not as complicated! (What are all those buttons for exactly?)
3. There are 7-11's everywhere! They are really nice too-stocked with croissants, fancy coffee machines, and wine.