Northern Arizona University
Northern Arizona University: Forty Years at the Grand Canyon
Site features the life of Bert Lauzon (1911-1951 CE) who spent his working life in the National Park Service at the Grand Canyon. Wonderful historic photos chronicle the early days in Arizona.
Curated OER
National Park Service: Grand Canyon National Park
The official site from the National Park Service. Includes information to plan a trip there, its geologic significance, its biological diversity, natural features, and ecosystems.