Slot Canyons. Gently carved from the Navajo sandstone over the course of countless millenniums. Original image from Carol M.… Free Image from public domain license 
Lady Bird Johnson Grove in Northern California. Original image from Carol M. Highsmith’s America, Library of Congress… Free Image from public domain license 
Sand dunes in Southern California. Original image from Carol M. Highsmith’s America, Library of Congress collection.… Free Image from public domain license 
