Ted the Caver. It’s the story of a caver who comes across something terrifying on an spelunking adventure. The story unfolds on a website done in the early 2000’s (its even on Angelfire!) almost like if the Blair Witch Project was a website and not a movie. Ending with a 404 error with a promise of more information is brilliant.
Turns out the story originally by Thomas Lera in 1987 (but is set in the early 2000’s) who pens horror and sci-fi stories on the the name “John Rowlands.” Lera is very interested in caves and speleophilately or the study of caves on stamps, covers, and cancelations. Yes, some people’s interests are more specific than yours.
I found the PDF of the original short story “The Fear of Darkness” on my computer and its a good read if you enjoy the Ted the Caver site. There’s something though about the interactivity of the site though and mysterious lack of conclusion.