Carreg Samson (also known as Carreg Sampson, Samson's Stone, or the Longhouse) is a 5000-year-old Neolithic dolmen located half a mile west of Abercastle near the Pembrokeshire Coast Path in Wales.

[3] The site was excavated in 1968 which revealed four additional stone-holes, one having supported a further chamber stone, the others indicating a possible passage leading off to the northwest.

[2] Slight traces of a covering cairn were found to the south and it was shown that the monument had been raised over a pit 0.8 metres deep, filled with clay and stones.

Finds included a small quantity of burnt bone, pottery, and flints.

[2] Media related to Carreg Sampson at Wikimedia Commons