• Charleston Falls Preserve

• Char Mar Ridge Preserve

• Chaparral Prairie State Nature Preserve

• Chalet Nivale Nature Preserve

• Cedar Point National Wildlife Refuge

• Cedar Bog State Nature Preserve

• Cascade Valley Metro Park

• Cannonball Prairie Metropark

• Canal Park

• California Woods Nature Preserve

• Calamus Swamp Preserve

• Caesar Creek State Park

• Caesar Creek Gorge State Nature Preserve

• Buzzard’s Roost Nature Preserve

• Burton Wetlands Nature Preserve

• Burr Oak State Park

• Buckeye Lake State Park

• Buckeye Furnace State Memorial

• Buck Creek State Park

• Brown Family Environmental Center