  Well for a start it's not specific enough. I'm guessing they are talking about the route from Gaping Gill to the show cave which i can imagine may take 16 hours and be about 8 miles. The show cave itself is a simple walk a mile into the cave and walk back out the same exit job, no crawling required (well not since the early 20th century!). Anyway i'm just going to remove it and somebody can add it back when they feel like clarifying and referencing the statement.   