Distance from Chicago: 23.3 miles; 30-45 minutes driving
Hike distance: 9.7 miles
The Forest Preserve District of DuPage County offers the perfect daytime hike through 2,492 acres of prairies, savannas, and shaded, oak-maple woodlands surrounding the Argonne National Laboratory. The multi-use, crushed limestone Waterfall Glen loop pauses atop a lofty vista overlooking the Des Plaines River and near a gentle waterfall (off the main path via the .2-mile Rocky Glen trail). Turns out the preserve is actually named after Seymour "Bug" Waterfall, an early board president, not its popular waterfall (?), but it's still a picnic-worthy spot. On foot, visitors can even explore the narrow, unmarked pathways crisscrossing through the preserve. But remember where you came from since they may or may not reconnect with mapped trails.