There is not a geocache hidden at the posted coordinates. It’s merely a place holder. This is the bonus geocache for the Curiouser & Curiouser: Cosas Oscuras, Comal County Adventure Lab.
You will need to complete the Adventure Lab to gather the clues and get the information you need to find the physical geocache. Let me know of any similar local curiosities or if you have further information on the locations I’ve taken you to. Special congratulations to Sparkyiv for FTF honors!
You can validate your puzzle solution with
certitude.