Watch the world go by - Idioms by The Free Dictionary
watch the world go by
watch the world go by spend time observing other people going about their business.
1996 Europe: Rough Guide Outdoor seating allows you to watch the world go by or to play a game of chess with giant chess pieces under the trees.
watch the ˈworld go by watch what is happening around you, but do little yourself: It was one of those cafes with a terrace where you can sit and watch the world go by.