In Hocking Hills State Park in Ohio for National Public Lands Day (© Sara Winter/Getty Images Plus)

In Hocking Hills State Park in Ohio for National Public Lands Day (© Sara Winter/Getty Images Plus)

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Here's a nice spot to enjoy National Public Lands Day. Hocking Hills State Park, a 2356-acre park in southern Ohio, offers over 25 miles of hiking trails that pass by unusual rock formations, recess caves, and stunning waterfalls. This is Upper Falls, at one of the park's most popular hiking destinations, Old Man's Cave. This huge recess cave, as the legend goes, was named for a hermit who lived here in the 1800s. Then there's Devil's Bathtub, Conkle's Hollow, and Rock House—sites worthy of a visit for their names alone, though the scenery won't disappoint.

Held annually on the fourth Saturday of September, National Public Lands Day aims to encourage people to enjoy our public parks as well as volunteer for one of the many projects going on today, like helping with trail maintenance or tree planting. At national parks, monuments, and other participating federal sites, admission is free today. At Hocking Hills, you can join a free naturalist-led walk leaving from the Whispering Cave trailhead. Be sure to grab a free litter bag to help pack out what others have left behind.