Related Clues:
- Russian mountains
- ___ Mountains, Europe/Asia separator
- River dividing Asia and Europe
- __ Mountains: Europe/Asia border range
- Mountain range separating two continents
- Where the Ob flows
- Home of Omsk and Tomsk
- River through southern Russia
- Europe/Asia border range
- Europe/Asia boundary river
- 1500-mile river to the Caspian Sea
- Classic exile site
- Continent-separating mountain range
- River serving Orsk
- River through the Steppe of Asia