| Pen Twyn Mawr | |
|---|---|
![]() Pen y Gadair Fawr from the summit of Pen Twyn Mawr  | |
| Highest point | |
| Elevation | 658 m (2,159 ft) | 
| Prominence | 17 m (56 ft) | 
| Parent peak | Pen y Gadair Fawr | 
| Listing | Nuttall | 
| Naming | |
| Language of name | Welsh | 
| Geography | |
| Location | Black Mountains, South Wales | 
| OS grid | SO241266 | 
| Topo map | OS Landranger 161 | 
Pen Twyn Mawr is a top of Pen y Gadair Fawr in the Black Mountains in south-eastern Wales. It lies on one of the many south ridges of Waun Fach.
The summit is marked by a pile of stones in an area of sandy soil and heather. Pen y Gadair Fawr is to the north, Chwarel y Fan to the east and Pen Allt-mawr to the west.[1]
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External links
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