Qinglongtan is shaped like a gourd, and the water in the pond is as clear as jade. There is a waterfall hanging at its north entrance, which roars like a bell and echoes through the valleys. It is said that due to the presence of a green dragon playing in the water here, it was named "Qinglongtan". According to another account, the famous Tang Dynasty minister Changsun Wuji was exiled here and often visited the pond to admire the waterfall. He looked north at Chang'an to express his homesickness and left a poem: "The Nong'a family lived under the morning song and passed on their name early on. They came together to swim on the Qi River, and their old love grew." This waterfall is also known as the "Dragon Singing Waterfall".