ills and valleys in south-central Kentucky make up Mammoth Cave National Park, one of four National Park units in the Commonwealth. Our 26th National Park is home to an enormous labyrinth of underground passages. In fact, Mammoth Cave today is understood to be the world's longest known cave system. Over 400 miles of passages have already been discovered, yet Mammoth Cave is not the only cavern in southern Kentucky. More than 300 other cave systems are known to exist within park boundaries, with many more beyond the reach of the national park. The discovery and exploitation of many of these created opportunity and prosperity for many who would seek to compete with the world famous Mammoth Cave. Roughly one hundred years of competition between enterprising cave managers, guides, locals, outsiders, explorers, and those loyal to one cave or another defined an era known as the Kentucky Cave Wars.