The Bangkok less traveled

If you live in Bangkok - just know it very well - what would you tell visitors to see?  Everyone knows about the Grand Palace and giant shopping malls, but what else is there?

What do the locals see and do?  Where do they go on their day off?  What do most visitors miss?

it all depends on your personal moods
you can go to china town ,Khao san road ,Lumpini park ,Chatuchak weekend market ,water park , museums....