Lewis and Clark first met Sacajawea and her French husband Toussaint Charbonneau in the Dakota Territory. The couple joined the expedition, acting as translators and guides.
The Horse Whisperer, shot in Montana and starring Robert Redford, tells the story of a troubled family, a troubled horse, and the horse whisperer who brings them together.
Scientists still don't entirely comprehend the 1.5 billion year history of the Grand Canyon; it's a story of erosion that has created one of the most breathtaking sites in America.
The engineers working on 3 World Trade Center in New York are among the most daring around. Not only do they operate their machinery up to 1,000 feet above street level, they do it without a safety harness.
Situated at the confluence of the Potomac and Shenandoah rivers, Harpers Ferry is the site of legendary abolitionist John Brown's historic raid on the US armory in 1859.