At the dawn of the 20th century, America west of the Mississippi was wild and untamed, featuring formidable landscapes and treacherous rivers. But in the following decades, industry and opportunity transformed the region into an economic and political powerhouse that drove change across the country and the world. Presented for the first time in color, revisit lands made famous by Buffalo Bill, championed by Teddy Roosevelt, and developed by opportunists seeking adventure and fortune.

• Liev Schreiber