Mynydd y Glyn is a mountain

Mountain

Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

 in South Wales

South Wales

South Wales is an area of Wales bordered by England and the Bristol Channel to the east and south, and Mid Wales and West Wales to the north and west. The most densely populated region in the south-west of the United Kingdom, it is home to around 2.1 million people and includes the capital city of...

, between the towns of Pontypridd

Pontypridd

Pontypridd is both a community and a principal town of Rhondda Cynon Taf, Wales and is situated 12 miles/19 km north of the Welsh capital city of Cardiff...

 and Tonyrefail

Tonyrefail

Tonyrefail is a village and community in Rhondda Cynon Taf County Borough, Wales. It is situated north west of Llantrisant at the head of the Ely Valley, south of the Rhondda, being around from Trebanog and around from Williamstown. It is also around from the village of Gilfach Goch...

. It has a height above sea level

Sea level

Mean sea level is a measure of the average height of the ocean's surface ; used as a standard in reckoning land elevation...

 of 377 metres.

It is the mountain which was used in The Englishman who went up a Hill and came down a Mountain

The Englishman Who Went Up a Hill But Came Down a Mountain

The Englishman Who Went Up a Hill But Came Down a Mountain is a 1995 film written by Ivor Monger and directed by Christopher Monger. It was screened in the Un Certain Regard section at the 1995 Cannes Film Festival....

in which Hugh Grant

Hugh Grant

Hugh John Mungo Grant is an English actor and film producer. He has received a Golden Globe Award, a BAFTA, and an Honorary César. His films have earned more than $2.4 billion from 25 theatrical releases worldwide. Grant achieved international stardom after appearing in Richard Curtis's...

 and Ian McNeice

Ian McNeice

Ian McNeice is a prolific English screen, stage, and television character actor.-Early life:McNeice was born in Basingstoke in Hampshire. McNeice's acting training started at the Taunton School in Somerset, followed by two years at the Salisbury Playhouse...

 star as English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 cartographers.. In the film the mountain is known as 'Ffynnon Garw'.

In the story, set in the First World War years, written by Ifor Christopher and Ivor Monger, Welsh villagers are determined to stop their local mountain being downgraded to a mere "hill". They do this by carrying loads of earth to the top and at the last moment, when the cartographers are due to leave, it reaches the height of 1,002 feet thus qualifying as a mountain. Later, in more modern times, the mountain 'settles' to about 997 feet and the descendants of the original villagers undertake the task again.

The story may be fictional (Christopher Monger says that the story was told to him by his Grandfather) but seems to imply that the hill in question is Garth Hill

Garth Hill

Garth Hill is a hill located near the village of Pentyrch in Cardiff...

 near Taff's Well

Taff's Well

Taff's Well or Taffs Well is a village located just north of the city of Cardiff and from its city centre. Located in the county borough of Rhondda Cynon Taf, Taff's Well serves as a commuter town.-Name:...

 (Ffynnon Taf in Welsh

Welsh language

Welsh is a member of the Brythonic branch of the Celtic languages spoken natively in Wales, by some along the Welsh border in England, and in Y Wladfa...

).