Years ago I visited Mammoth Cave, KY. There I learned about cave explorer Floyd Collins. He was trapped in a cave in 1925 and the incident attracted wide attention. I started reading about Collins and this is still one of the most terrifying reads for me. I cannot imagine being trapped so tightly, underground with no light and for so long.
https://www.mentalfloss.com/article/544782/1925-cave-rescue-...