Ancient sand dunes from glacial Lake Chicago meet restored wetlands and rare black oak savanna on 235 acres at the edge of the Calumet region. Naturalists lead guided walks through this quietly dramatic terrain, with hands-on exhibits and live animal displays introducing local turtles, snakes, frogs, and migratory birds. The landscape rewards repeat visits: warblers and trillium in spring, dragonflies over ponds in summer, gold savanna in fall, and the stripped-bone silence of winter snow.