Improved preserves
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Braidwood Dunes and Savanna Nature Preserve
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Colvin Grove Preserve
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Evans-Judge Preserve
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Forked Creek Preserve
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Goodenow Grove Nature Preserve
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Hadley Valley
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Hammel Woods
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Hickory Creek Preserve
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Hidden Oaks Preserve
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Isle a la Cache
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Joliet Iron Works Historic Site
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Kankakee Sands Preserve
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Keepataw Preserve
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Lake Chaminwood Preserve
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Lake Renwick Preserve
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Lambs Woods
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Laughton Preserve
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Lockport Prairie Nature Preserve
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Lower Rock Run Preserve
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McKinley Woods
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Messenger Marsh
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Messenger Woods Nature Preserve
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Monee Reservoir
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O'Hara Woods Preserve
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Plum Valley Preserve
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Prairie Bluff Preserve
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Raccoon Grove Nature Preserve
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Riverview Farmstead Preserve
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Rock Run Preserve
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Rock Run Rookery Preserve
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Runyon Preserve
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Sauk Trail Reservoir
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Sugar Creek Preserve
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Teale Woods Preserve
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Theodore Marsh
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Thorn Creek Woods Nature Preserve
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Vermont Cemetery Preserve
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Veterans Woods
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Whalon Lake
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Wolf Creek Preserve