Cave diving is like swimming through the history of the planet. There are remains of both humans and animals but also stalactites and stalagmites. These cannot form when the cave is flooded, so you can see when parts of it were submerged and when it was dry. Yet when I’m in a cave, time does not tick. There is no natural light, so the cave looks the same, whether it’s midday or midnight. If you cave dive without the right training, equipment and mindset, it can be a very dangerous place. I have a very meditative focus when I’m down