Largest cave system in the world
The visit to this national park is one of the highlights in any trip to Kentucky. Not only is it the largest cave system in the world, almost 300km and there still counting, but the whole area is a huge nature reserve. Its name means 'not to dwell'. Here, Mammoths have never been however, the size of these natural caves is mammoth. They were also inhabited by Native Americans. There is a very wide range of types of visits, varying in length and difficulty, and routes ranging from simplest to those requiring advanced knowledge of caving. What I found funny was that in one of the visits we used paraffin lanterns used by the ancient miners of old, but in the end, as we were with kids, we decided on the most basic, it is easy to develop for all ages, except for people with disabilities.