If you are a professional diver you should visit Cenote Angelita Mexico.
These pictures 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.”
and here is a video so you know it is real
