These amazing pictures and video were taken by Anatoly Beloshchin in the cave Cenote Angelita, Mexico.
Here’s his description:
“We are 30 meters deep, fresh water, then 60 meters deep
– salty water and under me I see a river, island and fallen leaves… Actually,
the river, which you can see, is a layer of hydrogen sulphide.”
I can imagine, that It must be an unforgettable feeling once you’re there and see it with your own eyes.