List of National Natural Landmarks in Ohio

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From List of National Natural Landmarks, these are the National Natural Landmarks in Ohio. There are 23 in total.

Name Image Date Location County Description
1 Arthur B. Williams Memorial Woods 1974 Cleveland Cuyahoga A remarkably pristine remnant beech-maple forest
2 Blacklick Woods Blacklick Woods Winter.jpg 1974 Fairfield An outstanding example of relatively undisturbed, old-growth beech-maple and swamp forest communities
3 Brown's Lake Bog Brown Lake Bog.jpg 1967 Wayne One of the few well-preserved, virgin boreal acid bogs remaining in a region where wetlands have been drained for agricultural use.
4 Buzzardroost Rock, Lynx Prairie, The Wilderness 1967 Adams Supports many rare or uncommon species and it has an almost 50- year history of scientific observations.
5 Cedar Bog Cedar Bog Ohio Trail.JPG 1967 Urbana Champaign An excellent example of a marl swamp.
6 Clear Fork Gorge 1967 Ashland Clearly illustrates evidence of stream reversal due to the Wisconsin glacier.
7 Clifton Gorge Clifton Gorge P4260050.jpg 1967 Greene Exemplary of interglacial and postglacial canyon-cutting into the dolomites of the Niagara Escarpment.
8 Crall Woods 1974 Ashland A near-virgin remnant of maple-basswood-beech forest-type.
9 Cranberry Bog 1968 Licking The only known bog of its type in existence.
10 Dysart Woods Dysart Woods 1967 Belmont Belmont One of the finest remaining examples of the white oak forests of eastern Ohio.
11 Fort Hill State Memorial Fort Hill State Memorial 1974 Hillsboro39°06′47″N 83°24′23″W / 39.1131°N 83.4063°W / 39.1131; -83.4063 (Fort Hill State Memorial) Highland Excellent outcrops of Silurian, Devonian, and Mississippian sedimentary bedrock and a natural bridge.
12 Glacial Grooves State Memorial 1967 Erie Very large limestone glacial grooves.
13 Glen Helen Natural Area Orators Mound.jpg 1965 Yellow Springs Greene Includes a waterfall that carved a large travertine bowl around its pool.
14 Goll Woods Tiffin River at Goll Woods State Nature Preserve in Ohio.jpg 1974 Fulton One of the best remaining examples of an oak-hickory dominated forest in Ohio.
15 Hazelwood Botanical Preserve 1974 Hamilton Highly detailed study of the site’s plant ecology was published in 1929.
16 Highbanks Natural Area 1980 Delaware, Franklin A forested bluff overlooking the Olentangy River.
17 Holden Natural Area 1967 Geauga, Lake A complex of three natural areas.
18 Hueston Woods 1967 Butler, Preble A noteworthy example of beech-maple climax forest that has never been cut.
19 Mantua Swamp 1976 Portage Contains many different wetland communities.
20 Mentor Marsh 1964 Lake Consists of marsh vegetation, aquatic plants, swamp and bottomland forest, and upland forest.
21 Serpent Mound Cryptoexplosive Structure 1980 Adams, Highland, Pike A structure of undetermined origin exposed by differential erosion.
22 Tinkers Creek Gorge 1967 Cuyahoga Contains a virgin oak-hickory and virgin beech-maple-hemlock forest.
23 White Pine Bog Forest 1976 Geauga The only remaining near-virgin remnant white pine boreal bog in Ohio.