A Gainsborough leisure centre will be transformed into a state-of-the-art sports hub as part of a £200,000 investment.
A new gym, restaurant and creche will be built at West Lindsey Leisure Centre, creating 100 jobs.
It is hoped a running track, tennis courts and new indoor bowls centre will also feature in the redevelopment.
West Lindsey District Council, which owns the facility, will fund much of the project.
Leader of the council Burt Keimach said: "I am very excited about this project and we hope to have it done as soon as possible.
"We want to provide a facility for everyone and that is why we wanted to build a restaurant and creche.
"West Lindsey Leisure Centre is the oldest swimming pool facility in the area and we are determined to make it a first class and state-of-the-art facility.
"It will really put Gainsborough on the map and become one of the most impressive facilities in the county.
"I have been stressing for a long time now that people in West Lindsey need to be thinking about their health more and more.
"I am a firm believer that regular exercise cuts crime and results in people performing better at work."
Sports and Leisure Management currently runs the facility in The Ave.
The firm's contract with West Lindsey District Council expires in two years and the local authority is reviewing the situation.
West Lindsey councillor Malcolm Parish is working on the project.
He told the Echo: "We want this project completed in four or five years.
"We are talking a substantial amount of money – I would estimate £200,000 at the very least. By the time everything is finished it will probably be much more than that.
"The centre is in desperate need of upgrading. Some parts of it are good and other parts, such as the tiny cafe, are diabolical.
"It is very early days in terms of what will definitely happen to the centre but it will be such positive news for Gainsborough."
Fitness fanatic Paschal Moran, 67, who has competed in 134 marathons, said: "It is a great idea and it will see lots more use the facility – from inside and outside Gainsborough."