The £86,000 project has focused on cutting back reed growth and reducing silt levels, to improve water flow, leading to greater water quality and increased biodiversity, as well as enhanced views across the area.
Popular with wildlife and local walkers, Cuckoo's Hollow is an area of green space in Werrington with a picturesque lake that is fed by Werrington Brook.
Councillor Nigel North, cabinet member for communities and environment capital, said: "Peterborough has many hidden gems like Cuckoo's Hollow, which help make the city such a great place to live. It's essential that we look after our natural environment, both for the wildlife that live there and for local residents to enjoy.
"The project has gone well and we have worked closely with the Environment Agency and the charity Peterborough Environment City Trust to minimise any impact to wildlife and to improve the area by creating a haven to encourage wildlife to flourish in the future.
"In the long-term, the Werrington Brook Improvement programme (WBI) will enable the lake to become more self-sustaining. There will be further work to the lake in the next three years, but public feedback supported our plans for urgent removal of reed growth."
A large amount of silt has been removed from the lake and is now drying on a section of the bank. Once drained, the silt will be landscaped and seeded with grass. Wildflowers will also be sown on the east bank of the lake to improve biodiversity in the area. More information on the work can be seen at www.peterborough-suds.org/cuckoos-hollow/.
The flow of water into Cuckoo's Hollow and sediment management will be further improved by the five year WBI programme, which is now underway.
More information about the project and its long-term environmental aims is available from www.pect.org.uk/WerringtonBrook.