Which river has its source in the Fuente de García, Aragon, near the Mediterranean and flows after 626 miles (1,007 km) across Spain and Portugal into the Atlantic?
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?
Which river flows from north to south through eastern New York State, USA, and briefly forms the border between Pennsylvania and New York before emptying into the Atlantic Ocean?
