As the water level drops, life returns to the river above Victoria Falls.

Hundreds of species rely on the Zambezi's life-giving waters, keeping to the rhythm of the seasons for their survival.

Starting in County Cavan, the Shannon River tumbles and twists 200 miles to the Atlantic Ocean. For anglers, it is the salmon that draws them to the Shannon.

When he was still a child, John Denver was moved to write his first song by the rushing waters of a Colorado River tributary.