Mammoth Cave National Park, Kentucky, United States of America
Located in Kentucky, Mammoth Cave National Park could be the longest cave system in the world. So far close to 630 kilometres, or nearly 400 miles, of caves have been discovered, explored and mapped. There are sixteen different cave tours to choose from, including the Mammoth Passage tour that is a leisurely walk through the cave and follows the path of those who first discovered it. The Grand Avenue Tour which is a gruelling trek that goes for more than four hours, while the River Styx Cave Tour shows visitors the underground rivers and how they created the cave system.
The toughest cave tour to take on is the Wild Cave Tour, for six hours visitors climb down and crawl along areas of the Mammoth Cave system that few others get to explore. Above ground, Mammoth Cave National Park is a place for hiking and riding horses and bicycles. On the Nolin River, Green River and other waterways in the area visitors can go fishing or paddle a canoe. The Mammoth Cave Hotel is a place to stay, and also contains three restaurants, while there are also areas for camping nearby. The address is Mammoth Cave National Park, 1 Mammoth Cave Parkway, Mammoth Cave, Kentucky.