Moel y Gamelin is a hill 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

North Wales

North Wales is the northernmost unofficial region of Wales. It is bordered to the south by the counties of Ceredigion and Powys in Mid Wales and to the east by the counties of Shropshire in the West Midlands and Cheshire in North West England...

, near the town of Llangollen

Llangollen

Llangollen is a small town and community in Denbighshire, north-east Wales, situated on the River Dee and on the edge of the Berwyn mountains. It has a population of 3,412.-History:...

. It is a summit of Llantysilio Mountain, at the mountain's eastern end, overlooking the Horseshoe Pass

Horseshoe Pass

The Horseshoe Pass is a mountain pass in Denbighshire, northeast Wales. It separates Llantysilio Mountain to the west from Cyrn-y-Brain to the east. The A542 road from Llandegla to Llangollen runs through the pass, reaching a maximum height of...

, and reaches an elevation of 577 metres (1,893 ft) above sea level. At its top is a round cairn

Cairn

Cairn is a term used mainly in the English-speaking world for a man-made pile of stones. It comes from the or . Cairns are found all over the world in uplands, on moorland, on mountaintops, near waterways and on sea cliffs, and also in barren desert and tundra areas...

, of unknown date, measuring about 30 metres (98.4 ft) in diameter and 1.8 metres (5.9 ft) high.