Thailand cave rescue: Friends say boys ignored warnings
https://edition-m.cnn.com/2018/07/05/asia/thailand-cave-town-intl/index.html
In unauthorized caves, ruins, and abandoned mines, it's too dangerous to explore without exparts.
I've heard that there are victims who died there, because they lost ways or fell into big holes.
So, those who are stuck in Thailand cave should have known that.
