Prickly pear cactus along Mississippi Bluffs (photo courtesy of Michael R. Jeffords)

Yonder Prairie, McHenry County (photo courtesy of Scott Kuykendall)

Wild Bergamot on Sugar Prairie (photo courtesy of Robert shaw)

Heron Pond Natural Area in Southern Illinois (photo courtesy of Michael R. Jeffords)

1.5 MW Vensys 77 Gearless Turbine (photo provided courtesy of the City of Geneseo)

Kohl Children's Museum

Cook County Courthouse

Photovoltaic panels on the Rice Conservation Center (photo courtesy of Chicago Botanic Garden)