This is hard to explain to those who haven't seen this show but, I saw it when I was much younger. It was a real documentary on these people that were crawling through these caves and were almost getting stuck as they went even deeper into the caves. They found alot ofhieroglyphics that have never been discovered before.
The most interesting part was the realism of them almost getting stuck in these caves. If anyone knows of what show this was, please let me know on this thread, thanks!. I can't remember if it was Discovery channel, or the History channel.