As the Monongahela River snakes north into Pennsylvania, it twists into horseshoe bends and has few straight stretches. Tucked into these curves are a series of small towns that represent America at its best. The river, which is one hundred and twenty-eight miles long, is divided into regions by local residents, and the mid section encompassing the communities of Brownsville, California, Belle Vernon, Charleroi, Monessen, Donora, and Monongahela is known as the Mid Mon Valley. What unites this region, in addition to a common landscape and common architecture, is a heritage of ethnic pride, industrial achievement, and championship sports teams. The Mid Mon Valley celebrates this history through a collection of striking postcards from the twentieth century.