What are the most beautiful legends you have heard about lakes?

Many lakes are more or less legendary. There is a lake called Ghost Lake, which means "poisonous black lake" in Tibetan. According to legend, there is a cosmic gate between the two lakes, which secretly connects the waters of the two lakes. The water quality of the holy lake and the ghost lake is completely different: the water in the holy lake is refreshing and sweet, and the water in the ghost lake is bitter and hard to swallow. Ghost Lake and Holy Lake live under the same snow mountain. There is no hatred, no war, only the bleak years that have accompanied hundreds of millions of years. It feels beautiful.