Devils Tower National Monument, Devils Tower, Wyoming (May 2000) Fort Union National Monument, Watrous, New Mexico (March 2001) Florissant Fossil Beds National Monument, Florissant, Colorado (July 2001) Colorado National Monument, Fruita, Colorado (February 2002) Navajo National Monument, Shonto, Arizona (October 2018) Walnut Canyon National Monument, Flagstaff, Arizona (November 2018) Sunset Crater Volcano National Monument, Flagstaff, Arizona (November 2018) To the home page 
U.S. National Park Service
To Gallery No.4 
To the top 