Avarga Toson comprises 2 sites: "Toson" lake and the "Avarga" mineral springs. The complex is located northwest of Delgerkhaan sum, in Khentii province, at an altitude of 1,300 meters.

The Toson Lake extends 300 meters in length and 250 meters in width, situated 5 km from the sum's center. The water originates from a cold underground spring, rich in minerals—particularly carbonate. The mud found along the lake's shores shares the same mineral composition as the lake water, and the entire site is renowned for its therapeutic properties, especially in treating dermatological and cardiovascular conditions.

Avarga is a cold spring located 11 km from Toson Lake, northwest of the Kherlen-Toono mountain, in the Avarga river valley. Similarly, the water is extremely rich in minerals and is recommended for treating digestive system ailments. Near the spring, you can also observe the ruins of Genghis Khan's "Aurig" palace.

The entire complex has been protected by the state since 1998.