This is limestone:
Limestone can be found just about anywhere you look in the south-central Kentucky area- any place a cave is nearby (this is because the rock is soft and easily carved by underground water systems.)
Limestone-rich areas are also believed to attract spirits. In my very scientifically sciencey research~ I’ve found this is because limestone can easily conduct electromagnetic energy. My research~ was cloudy on why it can do this, but it does. Anyway, ghostly ghosts can use this energy to manifest themselves- either in voice or physical form. Also, this type of energy is believed to hold strong to residual spirits- which is just left over energy from the person.
Enough of the sciencey science, let’s get to the ghostly ghosts.
Mammoth cave has lots of fun ghost stories, but this one is my favorite:
"In February 1858, an article appeared in Knickerbocker Magazine called "A Tragedy in Mammoth Cave". The story tells of a girl named Melissa, who confessed the entire tale on her deathbed, having succumbed to tuberculosis. Melissa was a southern girl who lived in the vicinity of Mammoth Cave and she had fallen in love with her tutor from Boston, a young man named Beverleigh. The tutor had ignored Melissa’s affections and began courting a neighbor girl instead. Melissa plotted her revenge.
Having grown up in the area, she knew well the twists and turns of Mammoth Cave and with careful planning, she lured Mr. Beverleigh to the cave. She conducted him on a “tour” to the depths of the cave and to a place called “Echo River”. Here, she vanished into a side passage and left the poor man to find his own way out. Days passed and Beverleigh did not return. Melissa had only meant the whole thing as a cruel joke and so in despair, she went back to the cave to look for him. She made daily treks underground, searching and calling out to him — but Beverleigh was never seen again.
Melissa was later diagnosed with consumption and died a short time later, never recovering from her guilt over the tutor’s death. Many believe that her ghost is still seen and heard in Mammoth Cave, desperately searching for the missing man.”
This is near where they would have gone underground:
I’ve never heard anything here— some have claimed to hear a woman coughing or calling out— but I still get the creeps walking by it. I’m not sure if it’s because I’m aware of the story or because something is actually there.