PBS
Pbs: New Perspectives on the West
This in-depth resource presents a history of the American West from pre-Columbian times until World War I with profiles, documents, and images. It encourages visitors to link these into patterns of historical meaning for themselves....
Bob Dunn
History Globe: The Oregon Trail: 1843 Map
Take a virtual tour of the historic Oregon Trail and see photos of the landmarks along the way. Compare the map of 1843 with a modern map of today.
Curated OER
Wikipedia: National Historic Landmarks in Wyoming: Independence Rock
Independence Rock is a large granite rock, approximately 130 ft (40 m) high, which served as a landmark on the Oregon Trail and California Trail in southwestern Natrona County.