This is the Naushki settlement, on the southern part of Buriatia. You can see the railroad station, the Selenga river and Mongolian area on the background.
Selenga is a major river in Mongolia and Buryatia, Russia. Its source rivers are the Ider River and the Delgermörön river. It flows into Lake Baikal and has a length of 616 miles (992 km). The Selenga River is the headwaters of the Yenisei-Angara River system. It carries 935 m³/s of water into Lake Baikal which comprises almost half of riverine inflow and forms a wide delta when it reaches the lake (680 km²).
The name derives from Evenki sele 'iron' + -nga (suffix). Selenge Province in northern Mongolia is derived from the name of this river. The Mongolian verb "seleh" means to swim.