Well, after recently getting back from a week in Tennessee, I've seen quite a bit of Southern monuments and national parks. One day on this trip, we drove down to Mammoth Caves in Kentucky.
The weather was stuffy and humid outside, but when out tour entered the caves, it started to become freezing.
The tour was great, with little amounts of stops, and the caves themselves were immensely beautiful. It's incredible to me how such large caves were formed by erosion.
Has anyone else been to Mammoth Caves? If you did, what part did you explore?
Here's a black and white picture of a bit of the caves.