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.
Deputy Minister for Economy with responsibility for the Valleys Taskforce, Lee Waters said: