What rivers connects the most major cities in ratio to its length?

I saw an earlier question in this sub to rank rivers by their major bank-cities. This one is more about smaller rivers with major impact My entry is Detroit river, that hosts Detroit and Windsor, the "Automotive Capital of Canada". And all that for a measly 26 miles/42 km.

Why does the territory of Nunavut control these islands that are closer to Ontario, Quebec and new foundland and labrador?

Has any nation changed its name more times in a short span of time, or even a century, than Cambodia? Its territory was called French Indochina, State of Cambodia, Khmer Republic, Democratic Kampuchea, People's Republic of Kampuchea, Kingdom of Cambodia, all in just the 2nd half of the 20th Century.