The Afon Aber is a small river in

Gwynedd Gwynedd () is a county in the north-west of Wales. It borders Anglesey across the Menai Strait to the north, Conwy, Denbighshire, and Powys to the east, Ceredigion over the Dyfi estuary to the south, and the Irish Sea to the west. The ci ...

that enters Liverpool Bay on the coast of North Wales at

Abergwyngregyn Abergwyngregyn () is a village and Community (Wales), community of historical note in Gwynedd, a county and Principal areas of Wales, principal area in Wales. Under its historic name of Aber Garth Celyn it was the seat of Llywelyn ap Gruffudd. ...

, . It rises in the

Carneddau The (lit. 'the cairns'; is a Welsh language, Welsh plural form, and is sometimes anglicised to ''Carnedds'') are a group of mountains in Snowdonia, Wales. They include the largest contiguous areas of high ground (over or high) in England and W ...

mountains on the northern watersheds of

Drum The drum is a member of the percussion group of musical instruments. In the Hornbostel–Sachs classification system, it is a membranophone. Drums consist of at least one membrane, called a drumhead or drum skin, that is stretched over a ...

Foel Fras Foel-fras (944 m / 3,097 ft) is a mountain in the Carneddau range, about 10 km east of Bethesda in North Wales. It lies on the border between the counties of Gwynedd and Conwy. With a summit elevation of 944 metres (3,074 feet) ...

and

Garnedd Uchaf , Furth Carnedd Gwenllian, previously known as Carnedd Uchaf until 2009, is a minor summit of the Carneddau range in Snowdonia, Wales, and included in the Welsh 3000s. From the summit, distant views to the north can extend as far as Ireland ...

and the eastern watersheds of

Drosgl Y Drosgl is a summit of the Carneddau range in Snowdonia, Wales, and forms a part of the western Carneddau, also known as the Berau, meaning 'stacks' or 'ricks'. It lies on a ridge heading west from Carnedd Gwenllian and Bera Mawr Bera ...

and Moel Wnion. It is principally noted for the spectacular waterfall of one of its principal tributaries, the

Aber Falls Aber Falls () is a waterfall located about two miles (3 km) south of the village of Abergwyngregyn, Gwynedd, Wales. The waterfall is formed as the plunges about over a sill of igneous rock in the foothills of the range. Two tributaries ...

, where it leaves the hills and descends in a single drop to the valley floor. The river, joined by the other main tributary, the

Afon Anafon Afon Anafon - geograph

The River Anafon, or Af ...

, then flows through a densely wooded valley which is now a

nature reserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, funga, or features of geologic ...

before entering the sea just north of Abergwyngregyn.

References

Abergwyngregyn Rivers of Gwynedd Rivers of Snowdonia {{Wales-river-stub