Here’s a photo of me that was taken while cenote diving in Mexico. A cenote is a large, limestone hole in the ground (forming a network of underwater rivers, iirc) that are mostly freshwater and were (and are) sacred to the Maya. Our guide was a technical diver (cave diver), as that this is a cavern dive. Dark and challenging, it was a near transformative experience. I’m a bit claustrophobic, and have typically not liked night dives. This dive is both enclosed at places, with places blocked off from direct natural light.