Founded in 1968, Forest Glen Preserve is 1800 acres in size. It is located seven miles east of Westville on County Highway 5. It is rated number three bSavanna Restoration Project Signotanically in Illinois and consists of beech-maple and oak-hickory forest types. There are four registered Illinois Nature Preserves within the park ( Duffin Woods, 200 acres; Forest Glen Seep, 11 acres; Howard's Hollow Seep, 30 acres), and Doris L. Westfall Prairie (40 acres). There is also a twenty-two acre savanna restoration area.