Explore Chicago Collections
https://explore.chicagocollections.org/records/?f2-cities=Park+Ridge&f1-cities=River+Grove&f3-topics=Natural+%26+Built+Environments%3A%3AConservation&f4-cities=Des+Plaines&sort=title&f5-topics=Natural%20%26%20Built%20Environments::Maps&f6-cities=Des%20Plaines