Designations of the 21st Century

Recently designated National Natural Landmarks include the following:

December 2023
  • Glenwood Caverns and Iron Mountain Hot Springs, Colorado
  • John Boyd Thatcher State Park, New York
View the Press Release for these designations
Learn more in the article New Landmarks Reveal Stories Millions of Years in the Making, Below and Above Ground

January 2021

View the Press Release for these designations
Learn more in the article High Plateaus, Smelly Caverns, and Coastal Dunes, Meet the Nation’s Newest Natural Landmarks

November 2016
June 2016
July 2014
April 2013
October 2012
May 2012
June 2011
October 2006

Last updated: December 13, 2023

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