From List of National Natural Landmarks, these are the National Natural Landmarks in Vermont. There are 12 in total.

Camel's Hump

Chazy Fossil Reef

Gifford Woods State Park

Lake Willoughby

Mount Mansfield

Cornwall Marsh

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Vermont National Natural Landmarks (clickable map)

	Name	Image	Date	Location	County	Ownership	Description
1	Battell Biological Preserve		1976		Addison	private	A pristine, climax, New England forest.
2	Barton River Marsh		1973		Orleans	state	A large, shallow, freshwater marsh considered one of the best in New England.
3	Camel's Hump		1968	44°19′10″N 72°53′11″W / 44.319547°N 72.886328°W / 44.319547; -72.886328 (Camel's Hump)	Chittenden, Washington	state	Supports the second largest extent of alpine-tundra in Vermont.
4	Cornwall Marsh		1973	43°54′57″N 73°11′11″W / 43.915926°N 73.186342°W / 43.915926; -73.186342 (Cornwall Marsh)	Addison	mixed- state, municipal, private	The largest unbroken red maple swamp in Vermont.
5	Franklin Bog		1973		Franklin	private	A cold, northern sphagnum-heath bog.
6	Fisher-Scott Memorial Pines		1976		Bennington	state	An old-growth stand of white pine.
7	Gifford Woods		1980	43°40′34″N 72°48′39″W / 43.6762°N 72.8109°W / 43.6762; -72.8109 (Gifford Woods)	Rutland	state	An old-growth, northern hardwood, climax forest.
8	Little Otter Creek Marsh		1973		Addison	mixed- state, private	Considered the best large expanse of marsh land in Vermont
9	Lake Willoughby Natural Area		1967	44°45′07″N 72°03′46″W / 44.751944°N 72.062778°W / 44.751944; -72.062778 (Lake Willoughby Natural Area)	Orleans	state	The deepest lake in Vermont and one of the most significant and scenic examples of glacial erosion in the northeast.
10	Molly Bog		1973		Lamoille	mixed- state, private	A classic, early successional, cold northern bog.
11	Mount Mansfield		1980	44°32′38″N 72°48′52″W / 44.543947°N 72.81431°W / 44.543947; -72.81431 (Mount Mansfield)	Chittenden, Lamoille	state	Contains a virgin, red spruce- balsam fir forest, extensive alpine tundra, and rare arctic flora not found elsewhere in the northeast.
12	Chazy Fossil Reef		2009	44°51′10″N 73°20′24″W / 44.8528°N 73.34°W / 44.8528; -73.34 (Chazy Fossil Reef)	Grand Isle	mixed- federal, state, private	The oldest known occurrence of a biologically diverse fossil reef in the world.