🇬🇧 United Kingdom · Megalith
Carreg Samson Dolmen
Early Neolithic (c.3800–3600 BCE) · Western Neolithic (Pembrokeshire)
Cliff-top portal dolmen near Abercastle harbour — massive capstone (4.7 m) on three orthostats with sea backdrop.
🇬🇧 United Kingdom · Megalith
Lligwy Burial Chamber
Early–Middle Neolithic (c.4000–3500 BCE) · Neolithic Anglesey (passage grave tradition)
Eastern Anglesey portal dolmen with colossal 25-tonne capstone (6.5 x 5.5 m) — one of Wales's heaviest.
🇬🇧 United Kingdom · Megalith
Dyffryn Ardudwy Burial Chamber
Early to Middle Neolithic · Irish Sea Neolithic
Double portal dolmen in Snowdonia foothills with two capstones sharing a mound near Cardigan Bay.