In the center of the town of Horse Cave, Kentucky, sits the entrance to the largest, privately operated cave in the state, Hidden River Cave, so named for its freshwater stream, which once provided drinking water and hydroelectricity to the city of Horse Cave.
But where did Horse Cave get its name? Stories claim that Indigenous tribes hid their horses there or that the name comes from a horse once falling into the sinkhole.
But, most likely, the answer is simply that “horse” was used to describe something big in the 18th and 19th centuries, like the Hidden River Cave.
– Jacqueline Gualtieri, The 100 Companies