Rõuge primeval valley is 10 km long and 52 metres deep. There are seven lakes at Rõuge primeval valley: Karila, Tõugjärv, Ratasjärv, Kaussjärv, Rõuge Suurjärv, Liinjärv, and Valgjärv. The lakes are connected by the River Rõuge or River Ajo, which starts from the Tindiorg Valley.
Tindiorg, Külmorg, Mõhkorg, Ööbikuorg, Tinopeetri, Hinni, Sikasoo, and Järveotsa are the tributary valleys of the Rõuge Primeval Valley. The most well-known is Ööbikuorg (Nightingale Valley) which fascinates you with its extremely beautiful nature and offers the possibility to have a rest, hike on the slopes of the valley, discover water rams powered by hydropower and take a ride by boat on the lakes of Rõuge. It got its name from the singing nightingales who stay there during the springtime when bird cherries bloom.
There are information boards at Rõuge Nightingale Valley that provides visitors with information about nature, history, and changes in climate.