These published works, manuscripts, images, and motion picture footage address the formation of the movement to conserve and protect America's natural heritage. Materials include 62 books and pamphlets, 140 Federal statutes and Congressional resolutions, 34 additional legislative documents, and excerpts from the Congressional Globe and the Congressional Record. An additional 360 presidential proclamations, 170 prints and photographs, two historic manuscripts, and two motion pictures are available.

Materials include Alfred Bierstadt paintings, period travel literature, a photographic record of Yosemite, and Congressional acts regarding conservation and the establishment of national parks. An annotated chronology discusses events in the development of the conservation movement with links to pertinent documents and images.

Historical aspects of many of the 384 areas under the National Park Service's stewardship are presented in this expansive site. A "Links to the Past" section contains more than 25 text and picture presentations on such diverse history-related topics as archeology, architecture, cultural groups and landscapes, historic buildings, and military history. Of particular interest to teachers, a section entitled "Teaching with Historic Places" features more than 60 lesson plans designed "to enliven the teaching of history, social studies, geography, civics, and other subjects" by incorporating National Register of Historic Places into educational explorations of historic subjects. Examples include an early rice plantation in South Carolina; the lives of turn-of-the-century immigrant cigar makers near Tampa, Florida; a contrast between the Indianapolis headquarters of African-American businesswoman Madam C. J. Walker and a small store in Kemmerer, Wyoming, that grew into the J. C. Penney Company, the first nationwide department store chain; the Civil War Andersonville prisoner of war camp; President John F. Kennedy's birthplace; the Liberty Bell; Finnish log cabins in Iowa; and the Massachusetts Bay Colony's Saugus Iron Works. Especially useful for teachers interested in connecting the study of history with historic sites.

This well-designed site presents the Nebraska edition of the Lewis and Clark journals, edited by Gary E. Moulton. The site provides the complete text of all the journals from the 1803–1806 expedition, as well as introductions, prefaces, and sources. The material is searchable by keyword and phrase.

There are 29 scholarly essays about the expedition. An image gallery offers 124 images of pages from the journals, 95 images of people and places, and 50 images of plants and animals encountered on the expedition. The maps section includes 12 explanatory maps and nine images of maps from the journals. Additionally, there are 27 audio excerpts of journal readings and eight video interviews with the editor of the project. The website stands as an outstanding resource for researching the history of the Lewis and Clark expedition.

Presents a narrative in exhibit format—with hyperlinks to archival documents and photographs—on the cultural and economic life of the people who came to the Central Illinois River region from 1875 to 1950. Organized into three sections on the harvesting of fish, waterfowl, mussels, and natural ice; transportation by boat, railroad, and plank roads; and the settlement and development of six area river towns. The site delivers oral histories (audio and video), as well as illustrations and photographs. It may serve as a useful introduction to those studying this particular region and regional history in general.

This site is a collection of 253 travel narratives written between 1750 and 1920. The narratives were written by American citizens and foreign visitors about their travels in America. Some of the accounts were written by famous Americans (James Fenimore Cooper and Washington Irving, for example), but most of the authors were not famous. The narratives include their observations and opinions about American people, places, and society; and are valuable sources for the study of early American attitudes. Most accounts are viewable either as scanned images or as transcribed texts. Also included is the 32-volume set of manuscript sources entitled Early Western Travels, 1748-1846. The collection is searchable by keyword, and may be browsed by subject, author, and title. Students and teachers will find these primary sources invaluable for research and study of the late 18th and 19th centuries.

Visitors to this site are invited to explore historical aspects of the roughly 200 National Park Service locations designated important to U.S. history and prehistory. Materials are organized by "cultural resource subjects," including archeology, architecture and engineers, cultural groups, cultural landscapes, historic buildings, mapping, maritime and military history, and "cultural resource programs," such as the American Indian Liaison Program and Heritage Preservation Services.

Visitors can search for information on more than 2.5 million Civil War soldiers and sailors; more than 71,000 properties listed in the National Register of Historic Places; and approximately 240,000 reports on federal archaeological projects in the National Archaeological Database. National Register Travel Itineraries provide historic guides to 18 cities and communities. The National Underground Railroad Network to Freedom contains information on 51 sites of importance and on slavery and antislavery efforts.

Also of interest are bibliographies on the African American west and public history, and full-text publications on the Antiquities Act of 1906 and the promotion of the city of Seattle during the gold rush era. The homepage—"History and Culture"—presents several topical, comprehensive historical exhibits including the "Eisenhower Virtual Museum."

This 1995 exhibition presents approximately 70 maps designed to help "understand [Thomas] Jefferson's views of the West and the nature of the quest to the Pacific," and to "show the evolution of cartographic knowledge of North America up to the time that [Meriwether] Lewis and [William] Clark set out."

Arranged into five sections, it treats the period from the arrival of Columbus in North America to Lewis and Clark's 1803 voyage.

Well-written background essays describe relevant monographs and journals, explain the role of technology in mapmaking, and elucidate the social and intellectual contexts of Western exploration.

The site, which offers both European and American perspectives, also furnishes eight related links and a 31-title bibliography.

Particularly useful for understanding the evolution of geographic knowledge about North America and for tracing the history of cartography during this period.

By the time Thomas Jefferson became the third President of the United States in 1801, interest in exploring the West had begun to shape U.S. policy. This chronological narrative traces Jefferson's life, participation in politics, and accumulation of scientific geographical knowledge from 1735 to 1804. There are four main sections: "The Jeffersons and Their Frontier Virginia Neighborhood," "From Colony to Commonwealth," "Science and Statecraft at Home and Abroad," and "Public Servant to the Early Republic."

This narrative is accompanied by an archive of 169 letters, statues, books, treaties, maps, and journals providing primary source insight into Jefferson's thoughts about the West and the Lewis and Clark expedition in particular. Three interactive maps from the 1700s, overlaid with historical data about cities, private dwellings, natural features, courthouses, and waterways, provide important insight into the geographic and social environment at the time.

This large collection of maps from the 16th century to the present day focuses on Americana and cartographic treasures.

Materials are organized into seven thematic categories—Cities and Towns, Conservation and Environment, Discovery and Exploration, Cultural Landscapes, Military Battles and Campaigns, Transportation and Communication, and General Maps. Sections include five special presentations.

Users may download maps or zoom in to view details. Seventeen specific map collections contained within this larger site that are of particular importance for the study of American history include "Discovery and Exploration," "The American Revolution and Its Era," "Railroad Maps, 1828–1900," "American Colonization Society Collection: Maps of Liberia, 1830–1870," "Panoramic Maps, 1847–1929," "Civil War Maps," and "Mapping the National Parks."

Due to copyright restrictions, only a small portion of the more than 25,000 digitized items from the Hannah Arendt papers can be viewed outside of three locations. Visitors who are not at the Library of Congress, New School University in New York City, or Carl von Ossietzky University in Oldenburg, Germany, may, however, view almost all of the collection's documents relating to the Adolph Eichmann trial and Arendt's book, Eichmann in Jerusalem. Material in this collection includes correspondence with holocaust survivors, minutes of the trial, Arendt's notes, and positive and negative reviews of the book. About one quarter of Arendt's general correspondence from 1938 to 1975, arranged alphabetically by correspondent, is available. Visitors may access eight folders of notes, lectures, fiction, and poetry from the 1920s and 1940s and all of Arendt's appointment books from 1972 to 1975. All material is in facsimile, much of it in German. Most of a collection of lecture notes, correspondence with students, and royalty statements for Arendt's books from 1949 to 1975 is available offline. Nearly half of a collection of drafts of Arendt's books, On Revolution and Between Past and Future may also be accessed from any location. Although limited, the site will be interesting for research on Arendt, modern Europe, and philosophy.