It must be the only river in the world that's more islands than water.

"But it is the only river I know of that is named after a woman."

This is the only natural river that flows out from the lake.

It is also the only river that a vessel bigger than a boat can travel up.

It is one of the only rivers in Florida with rapids.

It was the only river of that size in the section.

The only other river to do so is the Kootenay, just to the north.

The Großache is not the only river whose name changes at the border of 2 countries that share the same language.

It is the only river in Spain with shipping traffic.

It is also called the only river flowing beneath the earth.