The epic battle waged over dinosaur fossils by rival paleontologists in the American West.
The contradictory history of a dam that became a statement of American power and prestige.
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.
Today one of the most-recognized figures in American literary history, poet Walt Whitman was denounced by critics in his own time.
High on a granite cliff in South Dakota's Black Hills tower the huge carved faces of four American presidents: George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt.
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 300-year saga of the American whaling industry.
President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.