Rother Valley Country Park was this week celebrating its 30th anniversary.
Created as a green lung for the growing areas of Mosborough, Beighton and Sothall, it now attracts around 750,000 visitors a year as location for everything from walking the dog and birdwatching to sailing and water skiing.
The park, with five artificial lakes, was caved from a former opencast coal site.
Initially it was managed by a committee of representatives of five councils, including Sheffield, but it is now in the hands of Rotherham Council.
Joanne Edley, operations manager for development, said: “I think the park is the jewel in South Yorkshire’s crown. Staff love working here and many have done so for a number of years. We are focusing our efforts on developing the park so it will continue to attract people for another 30 years.”