National Natural Landmarks by county

Fond du Lac County, WI

Spruce Lake Bog
Spruce Lake Bog, a National Natural Landmark in Fond du Lac County, WI.

National Natural Landmarks in this county include:


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Please remember, National Natural Landmarks (NNLs) are not national parks. NNL status does not indicate public ownership, and many sites are not open for visitation.

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