It is intriguing to follow the course of a river as it winds its way from its often remote and mountainous source through countryside and urban areas, under bridges, past docks and harbours, ending in the sea or by joining with a larger river.

It is intriguing to follow the course of a river as it winds its way from its often remote and mountainous source through countryside and urban areas, under bridges, past docks and harbours, ending in the sea or by joining with a larger river.