MORTON ARBORETUM
This west suburban spot is for the refined nature-head. Trees, flowers, miles of trails, and even some giant troll sculptures sprawl across 1,700 acres. $15 (reserve time slot in advance). 7 a.m. to 6 p.m. Lisle
MIDEWIN NATIONAL TALLGRASS PRAIRIE
The former site of an ammunition plant, this 9,000-acre preserve has been restored to a tallgrass prairie, the largest open space in the Chicago area. If you’re lucky, you might catch a glimpse of — wait for it — a bison. Free. 4 a.m. to 10 p.m. Wilmington
WASHINGTON PARK
As much as you love nature, you need to relax some place where your LTE still works. This 346-acre expanse includes an important sculpture, and also the physically comforting presence of park district buildings. Free. 6 a.m. to 11 p.m. Washington Park
SKOKIE LAGOONS
Enjoy 894 acres of greenery, trails, and, you know, lagoons. Even if boat and kayak rentals aren’t available, you can still go for a quaint walk alongside the water. Plus, walking means you can’t accidentally capsize. Free. Sunrise to sunset. Winnetka
WALKING STICK WOODS
Part of the North Park Village Nature Center, these 12 wild acres feature a bunch of trails, including a kid-friendly path. Adults get fresh air; kids can take out pent-up energy on trees. It’s a win-win. Free. 6 a.m. to 11 p.m. Hollywood Park
PALMISANO PARK
You’re easily distracted by new things. Enter Palmisano Park. This area on the South Side has gone from a prehistoric coral reef to a quarry to a dump site to a park. A quarry to a park? That’s metal. Here, amid 27 acres spanning wetlands and a fishing pond, you can ponder your own reinvention. Free. 6 a.m. to 11 p.m. Bridgeport