This lake is located in the Govi-Altai province and it is surrounded by sand dunes. River Zavkhan flow into the lake. The lake covers an area of 4km2. The flowers growing on its shore and many flying birds over the lake make this lake incredibly beautiful. Locals call this the “Switzerland” of the Gobi. The lake Ereen has a special structure that does not allow it to be filled up with sand, even though it is located in the middle of the desert. On windy days however it looks like the sands are moving, the lake is still fresh and clear. When the people are thirsty, they assume the lake is a mirage because of the how this looks like. On very hot and dry summer days, it is amazing to see this deep blue fresh lake.

According to legend, 2 host children live in the lake. Early in the morning, at sunrise they play on top of the dunes. They immediately flee into the lake water when they see strangers. According to legend if you see those kids, it symbolizes that you will have good fortune in the future.