Journey to the Center of the Earth
No, not the Jules Verne novel.
In this case, it’s actually someone going into the deepest cave on Earth. At least, according to this article on the Sydney Morning Herald, it’s the deepest cave known to mankind. (Based on this article over at Politiken.dk, I’d be impressed if they found something deeper!) It’s a cave in Georgia, the former Soviet block country, not the American State. And, the current expedition is going further down than anyone has before. They’re litterally miles down into the Earth where the whole ecology is different and sunlight has never penetrated. Cool. Of course, when I posted the review of Descent, it should have been apparent that I dig strange stuff like this. If the articles on the real cave intrigue you at all, get Descent. You’ll love it!