List of National Natural Landmarks in New York

The National Natural Landmarks in New York include 29 of the more than 600 National Natural Landmarks (NNLs) in the United States. Twenty-seven landmarks are contained entirely within New York; the two exceptions are the Palisades of the Hudson which extends along the Hudson River into New Jersey, and the Chazy Fossil Reef which spans several Lake Champlain islands belonging to both New York and Vermont.

Source: Wikipedia — List of National Natural Landmarks in New York (CC BY-SA 4.0)