I was driving today and I was listening to NPR. I was only able to hear a short portion of the first story, but I wanted to put it out there for others to hear. This exploration of "Supercaves" is totally OD&D.
In the first story here on Here & Now, James Tabor talks about exploration in recognizable D&D terms. Awesome.
EDIT: At one point Mr. Tabor talks about cavers seeing "floating skulls" and "demon faces" in the dark! Sounds like a mythic underworld to me!
He's interviewed again on All Things Considered.