Here are some interesting things I learned about Mammoth Caves.
-They are hundreds of miles long, the longest in the world.
-The cave walls have bicarbonate in them (like Tums), and the caves were formed by reaction with acidic rain water.
-You have to disinfect your shoes when leaving the caves to kill the fungus that causes White Nose Syndrome.
Here is our walk to the caves.
Now the ground rules get set.... This guy was pretty strict.
Here we are, in the caves.
Wash them feet.