I have always enjoyed sitting at a cafe Patio on a nice summer day with a cold drink and just people watch. It use to be even nicer when everybody around you weren't holding their phones in the air taking pictures of anything that moves.
I can only imagine how lovely that would be in a European city with cobble stones and all sorts of interesting characters wandering past. Of course I can imagine even these places are not safe from the prying eyes of the cell phone activity.