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<http://schema.org/description>
"The Preseli Hills are a range of hills in west Wales forming part of the Pembrokeshire Coast National Park, with Foel Cwmcerwyn being the highest point at 1758 feet. The range stretches from Carn Ingli at Newport in the west to Frenni at Crymych in the east, 13 miles. The river Nyfer begins its journey near to Crymych and flows its eleven miles to the sea at Newport. The Preseli Bluestones of Stonehenge are believed to have come from these hills... "
<https://www.felinfach.com/blogs/blog/preseli-pembrokeshire>