The Borglum family archives include some historic home movies, early color films of the mountain's sculpting in progress. See Gutzon and the workers in action as they struggle with winches, jackhammers -- and Mother Nature.
When an earthen dam broke without warning, a small city in Pennsylvania was swept away in a wall of water over 30 feet high.
Before radar had been invented a devastating hurricane hit America, surprising residents of the East Coast and killing more than 600 people.
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.
President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation in Yosemite National Park.
Robert Marshall, Aldo Leopold and Howard Zahniser dedicated their lives to protect the shrinking American wilderness.
She set out to save a species… us.
The journey of Prince Maximilian, German naturalist, and artist Karl Bodmer, who explored the Mississippi River area from 1832-1834.
In 1934, American polar explorer Richard Byrd became the first to experience winter in Antarctica's interior.