Altai, or Altayn Nuruu
The Altai Mountains stand near the point where the borders of Russia, Mongolia, and China meet, extend to the southeast and then to the east and form part of the border between Mongolia and China.
Which river begins in the Rocky Mountains in south-west Colorado, crosses New Mexico and forms the border between Mexico and the USA before reaching the Gulf of Mexico?
The Lufra River and then the Lualaba River into which it flows are major headwaters (by volume) of the Congo River. Where do the rivers arise?