President Theodore Roosevelt was caught in the middle of the first major battle for wilderness preservation, over the building of Hetch Hetchy Dam in Yosemite National Park.
This stunning film portrait of Yosemite National Park uses the 1851 diary of the first expedition of soldiers into the Native American territory.
Begun during the Civil War, the transcontinental railroad employed 20,000 men, mostly immigrants, who built the iron road with their bare hands.
The New Deal program CCC put three million young men to work in camps across America.
The inspiring story of the modern environmental movement.
In 1927, the Mississippi River flooded from New Orleans to Illinois, leaving a million people homeless and leading to a major black migration to the North.
The worldwide migration by eager gold-seekers turned California into a land of opportunity and fierce competition.
The contradictory history of a dam that became a statement of American power and prestige.
It was the largest fire in American history: by the time it was all over, more than three million acres had burned and at least 78 firefighters were dead.