Landscape architects have restored a former construction waste landfill into a spectacular natural area with waterfalls and vibrant greenbelts.

The ecological rehabilitation of the 140-hectare site in Beijing has been completed ahead of the ninth China International Garden Expo.

"At Splendid Valley, what was the foul and rotten has been transformed into something rare and ethereal," said Hua Weijun, deputy director of the expo's planning office.