Eleven parks and heritage sites in the Valleys will be receiving more than £6.6 million in Welsh Government funding.
Cefn Coed Mining Museum, Caerphilly Castle and Parc Penallta are some of the 'Discovery Gateways' who will take a share of the money.
The funding will come from the Valleys Taskforce.
The First Minister Mark Drakeford and Deputy Minister for Economy and Transport Lee Waters, who is heading up the Valleys Taskforce, will make the announcement during a visit to Cefn Coed Mining Museum on Wednesday 11.
Some of the developments the money will be spent on include family accessible bike trails at Dare Valley Country Park, new signs and footpaths and a new visitor centre at Parc Penallta.
The Government hope this funding will draw economic and environmental benefits to the area.
Mark Drakeford said the funding will help bring people to the area.
As well as becoming destinations in their own right, Discovery Gateways have a great opportunity to tell the stories of the Valleys and encourage local people and visitors to explore the surrounding areas, including local towns and villages, and the wider landscape.
Deputy Minister for Economy with responsibility for the Valleys Taskforce, Lee Waters said:
These projects will put the Valleys Regional Park on the map nationally and internationally as a place which can inspire, excite and attract visitors from near and far. They will also provide opportunities for economic growth which is a key aim of the Valleys Taskforce.