All this talk of caves and cave systems brought back to my mind of that huge rescue in Thailand a few years ago when a load of young lads and an adult were trapped for a couple of weeks and there was a massive rescue. It must have been terrifying for them all, they were lucky they got out alive, though I do think one of the divers died.
I would never go down into a deep cave, I stay where I can see everything.
I might do so, but not to explore just to get out of the blazing sun. As I suffer from photophobia, I see much better in the dark.
However, I’m claustrophobic… I only managed once to visit a submarine but to please hubby who held my hand and never let go, Goddess me, I was so scared. Upon emerging had a fully blasted asthma attack. He never asked again. Thankfully!