Maps can be about what is underground as much as what is on the surface or above ground. Men have been mining for minerals for centuries. The map of Edmonson County shows where coal and iron reserves are to be found. The Geologic Map of Kentucky shows gas producing formations according to their geologic ages. Much of Kentucky has caves such as Mammoth and Lost River that have been partially mapped. A lot is happening under Kentucky.
Map Edmonson County Coal and Iron Company
Geologic Map of Kentucky
Lost River Nature Trails