Carn Menyn, Stone summit in Pembrokeshire, Wales
Carn Menyn is a summit in the Preseli Hills standing at 365 meters above sea level with a prominence of 48 meters. The rocky slopes feature distinctive spotted dolerite formations that make the terrain visibly different from the smoother hills around it.
In the 1920s geologist H.H. Thomas proved through rock analysis that many of the bluestones used at Stonehenge came from this location. This discovery connected the site to one of Britain's most important prehistoric monuments and its ancient builders.
The name Carn Menyn comes from Welsh and means 'butter stone'. The rocky outcrops shape how people move through the landscape, and locals have long associated these formations with the region's identity.
Multiple walking routes connect this summit to nearby peaks including Carn Sian and Foel Drygarn, making it easy to combine visits. Paths are well documented on hiking platforms and range from straightforward walks to more challenging scrambles.
This location once served as a quarry and traces of ancient stone extraction remain visible in the landscape today. Visitors often discover these quiet marks of past activity while exploring the rocky terrain.
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