A breathtaking journey down the Niagara River.

A breathtaking journey down the German section of the beautiful Moselle River, famous for vineyards on its dramatically steep banks and remarkable meandering loops.

Following the River Po, travelling across northern Italy from the snow-capped Alps to the spell-binding delta where the river meets the Adriatic Sea.

A journey along the 172km River Spey in Scotland, from its source in the Cairngorm mountains to where it enters the North Sea.

A journey down New York's mighty Hudson.

Bill Nighy narrates a breath-taking trip along the Shannon.