But is it a Tale of Two Cities.......Charles Dickens...........??  Or a tale of two rivers......the Mississippi flows south................the Missouri river hits it.............at St. Louis, MO.....................the Missouri river comes from the Rocky mountains.....................from the direction of the West.........where Yellowstone nat. park is............and the site of the world's biggest volcano.........

St Louis, Missouri

Missouri River - Wikipedia

https://en.wikipedia.org/wiki/Missouri_River

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Rising in the Rocky Mountains of western Montana, the Missouri flows east and south for 2,341 miles (3,767 km) before entering the Mississippi River north of St. Louis, Missouri.

‎Brower's Spring · ‎List of dams in the Missouri ... · ‎List of tributaries

Geography of St. Louis - Wikipedia

https://en.wikipedia.org/wiki/Geography_of_St._Louis

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St. Louis is located at 38°38′53″N 90°12′44″WCoordinates: 38°38′53″N 90°12′44″W. The city is built primarily on bluffs and terraces that rise 100–200 feet (30–61 m) above the western banks of the Mississippi River, just south of the Missouri-Mississippi confluence.

‎Metropolitan statistical area · ‎Cityscape · ‎Climate · ‎Flora and fauna

Mississippi River - Wikipedia

https://en.wikipedia.org/wiki/Mississippi_River

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By the time the Upper Mississippi reaches Saint Paul, Minnesota, below Lock and Dam No. 1, it has dropped more than half its original elevation and is 687 feet (209 m) above sea level. From St. Paul to St. Louis, Missouri, the river elevation falls much more slowly, and is controlled and managed as a series of pools created ...

Source‎: ‎Lake Itasca

Basin‎: ‎1,151,000 sq mi (2,981,076 km²)

Mouth‎: ‎Gulf of Mexico

Length‎: ‎2,320 mi (3,734 km)