Together with Valdivia and Futa River it encloses the fluvial island of Isla del Rey.

The fresh waters of Tornagaleones comes from Futa, Naguilán and Valdivia River.

During high tide brackish waters from Corral Bay enters the channel.

The name of the river derives from its utility in navigation as it allowed ships to turn around and position their bow towards the Pacific Ocean.

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