Until 1 April: Oxford's River and Rowing Museum has collaborated with the UK Environment Agency to present an exhibition celebrating the river Thames which was awarded the International Theiss River Prize in 2010.
Citing the fact that some 70km of the river had been restored or enhanced, as well as its increasingly-teeming supply of fish, the judges said the Thames had gone "from a biologically dead river in the 1950s" to become the "thriving waterway" it is today.
The river beat other finalists, such as Australia's Hattah Lakes and China's Yellow River, to scoop the top prize which is given for achievements in river management and restoration.
The exhibition explores the five projects that helped make the Thames one of the world's best kept and best managed rivers, as well as revealing how part of the £218,100 prize money is being used to help communities along the River Ganges.
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Triumphant Thames: The Thiess International River Prize
River and Rowing Museum, Henley-on-Thames, Oxfordshire, tel. +441491415600.