Mammoth cave is located in Bowling Green, Kentucky. It is the world’s longest known cave system, with more than 400 miles explored. The park was established as a national park on July 1, 1941. It became a World Heritage Site on October 27, 1981, and an international Biosphere Reserve on September 26, 1990.
Below is the chronology of wild caving tour at Mammoth cave, took place on Oct 12, 2015. You can enlarge the photos by clicking on it.
On October 12, 2015, I finally crossed off my long postponed quest from my adventure list. I was at 300 ft below the ground surface, crawling through 5-6 miles underground passages for 6+ hours; this is equivalent to living a life in full.