A few of my favorite locations are:
(I'll continue to add as I find hidden gems!)
Lindberg Park
508 N Winston Dr
Palatine, IL 60074
Garfield Park Conservatory (permit required)
300 N Central Park Ave
Chicago, IL 60624
Lincoln Park Nature Boardwalk
2121 N Stockton Dr
Chicago, IL 60614
Chicago Botanic Garden (permit required)
1000 Lake Cook Road
Glenco, IL 60022
Lighthouse Beach
Central St. & Sheridan Road
Evanston, IL
Cantigny Park (permit required)
1S151 Winfield Road
Wheaton, IL
The Grove (permit required)
1421 Milwaukee Avenue
Glenview, IL 60025