When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The 300-year saga of the American whaling industry.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.
John Wesley Powell's epic journey into the unknown Grand Canyon was filled with adventure as his team mapped the Colorado River for the first time.
The inspiring story of the modern environmental movement.
The New Deal program CCC put three million young men to work in camps across America.