Bryn Alyn is a hill

Hill

A hill is a landform that extends above the surrounding terrain. Hills often have a distinct summit, although in areas with scarp/dip topography a hill may refer to a particular section of flat terrain without a massive summit A hill is a landform that extends above the surrounding terrain. Hills...

 and Site of Special Scientific Interest

Site of Special Scientific Interest

A Site of Special Scientific Interest is a conservation designation denoting a protected area in the United Kingdom. SSSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in Great Britain are based upon...

 in Denbighshire

Denbighshire

Denbighshire is a county in north-east Wales. It is named after the historic county of Denbighshire, but has substantially different borders. Denbighshire has the distinction of being the oldest inhabited part of Wales. Pontnewydd Palaeolithic site has remains of Neanderthals from 225,000 years...

, North Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

, and forms part of the Clwydian Range

Clwydian Range

The Clwydian Range is a series of hills and mountains in north east Wales that runs from Llandegla in the south to Prestatyn in the north, with the highest point being the popular Moel Famau...

 Area of Outstanding Natural Beauty

Area of Outstanding Natural Beauty

An Area of Outstanding Natural Beauty is an area of countryside considered to have significant landscape value in England, Wales or Northern Ireland, that has been specially designated by the Countryside Agency on behalf of the United Kingdom government; the Countryside Council for Wales on...

. Bryn Alyn lies to the east of the River Alyn

River Alyn

The River Alyn is a tributary of the River Dee. The River Alyn rises at the southern end of the Clwydian hills and the Alyn Valley forms part of the Clwydian Range Area of Outstanding Natural Beauty...

, with the valley of Dyffryn Alyn separating it from the main range of the Clwydian hills. At just 408m, Bryn Alyn's significance is not in its height, but in the dramatic west-facing limestone cliffs, which can be seen from the nearby A494 trunk road

A494 road

The A494 is an important trunk road in Wales. The road runs between "Drome Corner" at the intersection of the A548 and A550 by RAF Sealand, Queensferry and the A470 at Dolgellau, Gwynedd.-Beginnings:...

 and from many of the walking routes in the southern Clwydian hills. Areas of natural limestone pavement

Limestone pavement

A limestone pavement is a natural karst landform consisting of a flat, incised surface of exposed limestone that resembles an artificial pavement. The term is mainly used in the UK where many of these landforms have developed distinctive surface patterning resembling block of paving...

 can be found throughout the upper parts of the hill. The main points of access to Bryn Alyn are from the nearby villages of Llanferres

Llanferres

Llanferres is a village and parish in the county of Denbighshire in Wales. At the 2001 Census the population of the village was recorded as 676.- Geography :...

 and Eryrys

Eryrys

Eryrys is a village in Denbighshire, Wales, located at approximate grid reference SJ203578, five miles south of Mold. The village is built on the limestone formation of Bryn Alyn and many limestone outcrops can be seen close by...

. A nature information board for Bryn Alyn can be found in the layby on the A494 just south of Llanferres, at grid reference SJ188600.