u/la_lupetta

I can't repost here, so go see if you wanna. It's super long and talks about traditional beliefs and religious rituals in deep, complex cave systems in prehistoric North America...and contains an interesting snippet about the original Lost John. I would presume that this system, or at least part of it, is Lost John's Cave.

https://www.reddit.com/r/HistoryAnecdotes/comments/1vsiydq/early_woodland_people_figured_out_the_structure/

TL;DR: >! Lost John is a prehistoric man found trapped under a boulder in a cave section that was 2 miles from the entrance and would have taken several hours to travel to. He was likely on a religious ritual at the time he died. !<