Ultimate Guide to Mammoth Cave, Kentucky (Tours, Pricing, History, Map)

Beginning to form more than 10 million years ago, Mammoth Cave is the longest cave system in the world. There are more than 400 miles of caves running under Kentucky, and that is just what has been mapped. Mammoth Cave is one of the Natural Wonders of the United States, alongside Niagara Falls, Hawaii Volcano Natural Park, Devil’s Tower, Old […]