Kennall Vale Nature reserve is on the site of a former gunpowder works which used to supply explosives to the Cornish mining industry. The site was chosen because the fast-flowing River Kennall was ideal to provide a source of power for turning waterwheels for use in the gunpowder making process. The river was diverting into leats, which in turn flowed into the waterwheels. Many of the leats are still in existence, as are many ruined buildings that used to form the works.
Not only is this a 'water photographers' paradise (because of the tree cover, an ND filter is not required to get longer shutter speeds) but also a wonderful riverside walk in mature woodland that houses an abundance of wildlife. Parking is limited along the roadside, so be prepared for a walk from the main village of Ponsanooth.