Lake Barracuda in Indonesia

Lakeside Barracuda is the most unique lake I've ever found, from a depth of 0-12 meters the water is cold cold, so enter 12 meters down as if going into the sauna, the water is hot around 35C-40C, hotter than sunbathing on the beach, it feels like eggs on the stew, but had met a large barracuda fish living in a lake that water 70% tasteless, 20% salty, 10% urine, karst surrounding rocks, whatever makes the water can be as hot under cold water.