About National Natural Landmarks

What are National Natural Landmarks?

Discover what National Natural Landmarks are and why they are important.
How are NNLs Designated?

Discover the process of how National Natural Landmarks are designated.
About the NNL Program

Learn more about the National Natural Landmarks Program.
Learn more!
Frequently Asked Questions

A list of frequently asked questions and their answers
60 years of NNL designation
The First NNL Sites

Learn about the very first NNL sites designated in 1964.
Timeline of NNL Designations

Explore newly designated NNLs and a timeline of NNL designations.

NNL Directory

Explore the 600+ National Natural Landmark sites.

Last updated: December 3, 2025