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.
The New Deal program CCC put three million young men to work in camps across America.
The journey of Prince Maximilian, German naturalist, and artist Karl Bodmer, who explored the Mississippi River area from 1832-1834.
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 worldwide migration by eager gold-seekers turned California into a land of opportunity and fierce competition.
The remarkable story of how a railroad was built connecting California to the East.
The inspiring story of the modern environmental movement.
Originally settled as a mail stop, Las Vegas changed from an Old West vacation town, to a mafia haven, to the "Atomic City" and "Sin City."
Her 1963 warnings about the effects of pesticides and herbicides sparked a revolution in environmental policy.