These postcard images show the development of Joplin from a scattering of rough mining camps through the mid-point of 20th Century. They provide an indelible image of a city that grew virtually overnight to become the world's premier supplier of lead and zinc ore. Because of these raw materials, the city also became a transportation hub and still retains the title of The Crossroads of America. In addition to pictures of mines and miners, there are images of Joplin's extravagantly landscaped parks and public recreation areas as well as souvenir postcards of the little motels and motor courts that sprang up along the path of America's most famous highway, Route 66.