There are currently 599 designated National Natural Landmark sites within 48 states, American Samoa, Guam, Puerto Rico, and the U.S. Virgin Islands. Louisiana and Delaware are the only two states that do not contain a NNL site. Of the existing landmark sites approximately one-half are administered solely by public agencies (e.g., Federal, State, county, or municipal governments), nearly one-third are owned entirely by private parties and the remaining are owned or administered by a mixture of public and private owners.
Sites are designated as NNLs because they contain the best remaining examples of specific biological and/or geological features. The natural features represented include aquatic and terrestrial ecosystems, geological processes and resultant landforms, and records of geologic history. Each site is a piece of the larger picture that is the illustration of the great diversity of our Nation's natural landscape.
A listing of all NNLs by state and county can be found in the National Registry of Natural Landmarks. Or, click a state on the map below to explore NNL sites nearby or faraway.
Learn more about National Natural Landmarks in each state.
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. For questions regarding access to any NNL site, please contact the appropriate NNL Coordinator as determined by state.
Last updated: September 8, 2016