Ryonju Ponds are in Onjong-ri, Kosong County of Kangwon Province.
They are situated in Okryu-dong, Kuryongyon District of Outer Kumgang of the famous Mt. Kumgang of Korea. They are called Ryonju Ponds because they are contiguous to each other like two blue gems threaded.
The upper pond is small, 6 metres wide, 10 metres long and 6 metres deep. The lower one is big, 9 metres wide, 30 metres long and 9 metres deep.
The two ponds on a white broad and flat rock get filled with clear and blue water before overflowing.
Lying on the upper end of the Ryonju Ponds is a sloping square rock as if crossing the valley and the Ryonju Falls running down the rock into the ponds look like a thin silk cloth hanging down.
The clean and elegant Ryonju Ponds are in good harmony with the falls, valley, white rock, geographical features of mountains on both sides and green woods, presenting a unique beauty in the Okryudong valley.
The Ryonju Ponds have been registered as Natural Monuments No. 417 in December Juche 71 (1982).