Researchers working 100 feet beneath your feet in 1998 felt a breeze coming from between some rocks - a hint that a void lay beyond. Moving rocks, they crawled into a passage shown on no map. Their lights found burnt torches, untouched since the last visitor left them - over 2,000 years earlier.
The researchers left until they could bring an archaeologist with them to record the find. In time, they would name the new passage "Watson Trace" after archaeologist Patty Jo Watson and geologist Red Watson, whose research here led to much of what we know today about Mammoth Cave's ancient explorers.