Pen-y-Fan Pond Country Park near Oakdale hosts a day of rock climbing, canoeing and kayaking taster sessions for children, from 11am to 3pm.
There will also be a Bushcraft area for whistle making, fire-lighting and toasting marshmallows.
The day costs £5 which includes all activities.
Booking is required by calling 01443 875557.
Pen-y-fan Pond is one of the last remaining canal feeder reservoirs in Wales.