Waterfall Country is the name given to an area around the head of the Vale of Neath in South Wales where an unusually large number of publicly accessible falls are to be found. The area is loosely defined but generally includes the group of falls on the Nedd Fechan, Pyrddin, Hepste and Mellte rivers, all of which lie in the country between the villages of Pontneddfechan and Ystradfellte in the southern part of the Brecon Beacons National Park. All of these falls lie within or on the boundary of the county of Brecknockshire, now part of the unitary authority of Powys. A few miles further west are Henrhyd Falls on the Nant Llech, a tributary of the Tawe and to the southwest are Melin Court Falls on the Melin Court Brook, a tributary of the River Neath. These, along with Aberdulais Falls on the Dulais, a further tributary of the Neath are also encompassed by the term 'Waterfall/s Country' by some writers.
Collectively the falls are one of the most popular natural attractions in South Wales, a fact which has brought about problems of erosion in the vicinity of many of the falls. Most occupy locations designated as sites of special scientific interest or as special areas of conservation which aim to protect the biodiversity and geodiversity of these sites. The designations place a duty on the landowners and managers to protect the sites and so various erosion control measures have been put in place in an attempt to counter the worst problems.