The Sierra Club maintains a "John Muir Exhibit" containing a short biography, a lengthy list of books and articles by and about Muir, links to relevant photography collections, and lesson plans for teachers.

The National Humanities Center has constructed a site entitled "Nature Transformed: The Environment in American History." Short essays address a number of topics including "The Roots of Preservation: Emerson, Thoreau, and the Hudson River School," and "The Challenge of the Arid West."

The National Archives has posted a rich collection of images at this site.