The National Natural Landmarks Program recognizes and encourages the conservation of sites that contain outstanding biological and geological resources. Sites are designated by the Secretary of the Interior for their condition, illustrative character, rarity, diversity, and value to science and education. The National Park Service administers the program and works cooperatively with landowners, managers and partners to promote conservation and appreciation of our nation's natural heritage.
National Natural Landmarks Program
Three new landmarks designated!
The Secretary of the Interior designated three new National Natural Landmark sites in January 2021. Learn more here!
International Year of Caves and Karst
2021 is the year to celebrate caves and karst landscapes! Learn more about NNLs with caves.
2020 Landmark Highlights
Explore accomplishments at NNL sites during 2020!
NNL Videos
Kick back, make some popcorn, and enjoy a few short videos about the NNL program and some of the unique resources found at various NNLs.
Last updated: October 6, 2021