Scouts from across the world helped to clean Chafford Gorge as part of the World Scout Jamboree.
Scouts from Norway, France, India and Germany joined together to clean the pond, trim hedges and pick up litter at the gorge.
Hayley Arnold, Chafford Gorges Community Wildlife Officer, said: "They worked really hard. They enjoyed finding out what lived in the lakes, using nets, trays and identification charts. It was so good to see young people from all over the world working together. We are very grateful to them."
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