Usually a little spring or an upland wet area.
The beginning of a river is usually located high in the mountains. It may be known as either the "source" or the "headwaters".
Blythe is located on the Colorado River
Its source is located in Bodmin Moor where one of its tributaries, river Jordan, connects with it.
Headwater
The source of the Tagus River is located in eastern Span. The river flows 565 miles into the Atlantic Ocean.
the Mississippi river
The Passaic River is located in New Jersey. Its source is in Mendham, New Jersey from an unnamed pond.
egypt
Gulf of Mexico.
Source Lake Itasca mouth Gulf of Mexico
Mungaragiyn-Gol, located in Mongolia, is the source of the Yenisei River. The average depth of the river is 45 feet, but some parts are as deep as 80 feet.
Where it originates. Perhaps from the falls, or from an underground source.