Puhua Underground River stretches 1.6 km in length, which is of typical karst landform. In the scenic spot, steep cliffs, rivers through the cave, and main marvelous attractions like Overwater Three Natural Bridges, Sky's Eyes, Underground River, Great Tunnel, Geyser, Red Cave, Precipice Plank Road, Puhua River Gorge present beautiful sceneries for tourists. Valleys on both banks of the river are standing with grace, like a maiden looking forever at Puhua Underground River flowing into the sea. In the river valley, there are crystal clear streams, flocks of egrets, lots of fish and shrimp. In Puhua Underground River, the annual average temperature is 15 degrees Celsius, and the highest temperature in summer is 31 degrees Celsius. Besides, the karst caves stay at near-constant temperature 22 degrees Celsius through a year. Hence, it is known as “Central air-conditioning”.