the beach. chicago set it aside for public use instead of reserving it only for the rich and now the lake front is several giant parks with at least one beach on each one and lots of other stuff to do.

i prefer the beaches w/o children (eg hollywood) where you can spend all day & night having a good time until the police make everyone leave and they have a restaurant & bar on the beaches that’s really convenient and with a beach friendly dress code on the adult beaches.