2500 W. Lunt This is hands-down the best hide-and-seek spot in Chicago. I still remember a sixth-grade school scavenger hunt that included finding a duck feather. Indian Boundary's pretty setting includes new expanses of natural-habitat gardens, a new Nature Play Center, a big old sprinkler area with dancing bears and, of course, the rambling wooden maze of a playground. This is one of those old-fashioned '70s-era structures that begs to be climbed, conquered and hidden in. Foot bridges sway and creak, fat tire structures invite crawl-throughs. The park's fieldhouse has public bathrooms, and there are three tennis courts.