Eleven Jones Cave

[4] It is the only known habitat for the Louisville cave beetle, which is listed as a candidate for endangered species status.

The Joneses eventually left the area, and their treasure reportedly hid behind collapsed rocks.

The cave was supposedly once large enough to drive a horse and carriage through, but has since "shrunk," a geological impossibility.

[6] Three-inch bars on a gate were supposed to further decrease the chances that someone might find the Jones' gold, silver, and jewels.

[4] Early descriptions of the area, as late as 1822, make no mention of the cave or legends surrounding it, but it was known to locals as the source of a spring by 1831.

[4] "Bad air" is present in the cave, with very high levels of carbon dioxide just inside the entrance.

[9] A character in 17776 hides in Eleven Jones Cave, and breaks the fourth wall to warn the reader not to visit it due to the danger present in the location.