Hear ye! Hear ye, citizens of Chicago.
Bundle up and visit the Lake.
Seriously, do it.
Do it even though it's about to rain. Do it even though it's dark. Do it even though it's cold. Grab some friends and just get there.
You'll find some powerful isolation in a city of millions.
Now don't everyone do it at once or the whole point will be lost.
Next nighttime, grab some friends and get to the Lake.