Improvements to playgrounds and trails will be part of a spruce up of the 12th Century Rufford Abbey in Nottinghamshire if county council plans go ahead.
The 85ha park is the second most-visited country park in the East Midlands and attracted 460,000 visitors last year.
Now Nottingham County Council is proposing a redesign of two children's play areas and the resurfacing of major footpaths around the lakes and in the woods.
Repairs would be made to the Rufford Mill and two Georgian ice houses on the sites and cottages refurbished so they could be rented out.
The site lost its Green Flag three years ago and, according to countryside service manager Gareth Broome the council plans to get it back by 2018.
He told the BBC: "Time is taking its toll on such an old range of buildings. The place is in need of some extra attention to preserve the historic remains.
"We need a coherent plan so that we can go out and bid for the money from lottery funds and other sources of funding."
In the last year, £168,000 worth of improvements have been made by the council to the footpaths, Rufford Mill car park and the bridges around the lake.