There are currently 606 designated National Natural Landmark sites (NNLs) within 48 states, American Samoa, Guam, Puerto Rico, and the U.S. Virgin Islands.
NNLs are not units of the National Park System. NNL status does not indicate public ownership and many sites are not open for visitation. For additional site information or questions regarding access, please contact NNL Program staff.
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.
Discover landmarks by state or use the map and table to explore.
Explore NNLs by state, county, designation year and land ownership. Download a printable list of all NNLs from the NPS Datastore.
| Landmark Name | Primary State (Secondary State) | Primary Counties (Secondary Counties) | Designation Year | Ownership |
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Last updated: July 10, 2026