It has its origin Cottian Alps, Italy and mouth at the Adriatic Sea with basin countries of Italy and Switzerland.
The Seine River flows through France, though it may seem big enough to flow through many countries, it does only flow through the one and only France.
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The River Thames flows through 8 counties.
The Mackenzie River is one of the largest in all of Canada. It is long enough that it runs through at least 10 different towns throughout the Yukon.
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The Nile is known to flow through 20 different country's.
It does not flow through Kenya.
I find no mention of a river named Mediterranean River" anywhere on the Internet There are many rivers, running through many countries, around the Mediterranean Sea.
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The River Thames flows through 8 counties.
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10 states