When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
The contradictory history of a dam that became a statement of American power and prestige.
A daunting story of shipwreck, starvation, mutiny and cannibalism amongst a group left abandoned in the high Arctic.
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 most daring and innovative accomplishment at the turn of the 20th century.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
The life of the legendary photographer, known best for his black and white images of the wilderness of the American West.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.