The lake is about 700 m long and arose as a backwater of the Red River. Even in the 18th century, the lake was several times larger than today, had direct access to the Red River, fleets parades, and was connected with the other lakes of the city by canals. In the 18th century, the Trinh princes had 52 palaces along its shores. The lake was in the 19./20. Century partly.
In 1968, a turtle of a length of 2.10 m and a weight of 250 kg was recovered from the lake, which was about 400 years old. It is displayed in a glass box in the Jadeberg Temple. The Jade Mountain Temple is located on a small island, which leads to Huc Bridge. In the lake also lived until January 2016 also a single specimen of the softshell turtle.