Caving System
what is the location of the world’s largest-known cave system?
answer must be in the US
“Located in central Kentucky, Mammoth Cave National Park is the largest known cave system in the world, with more than 336 miles of underground caves that have been explored and mapped. This area was designated as a National Park in 1941. The park is just off of I-65, south of Louisville and it attracts more than 2.5 million visitors each year. ”
“The cave system with the greatest total length of surveyed passage is Mammoth Cave (Kentucky, USA) at 591 kilometers (367 mi) in length. This record is unlikely to be surpassed in the near future, as the next most extensive known cave is Jewel Cave near Custer, South Dakota, at 225 kilometers (140 mi).”