what is a dolmen
Trethevy Quoit â Koyt Trethewi, a Cornish dolmen. A dolmen (/ËdÉlmÉn/) is a type of single-chamber megalithic tomb, usually consisting of two or more vertical megaliths supporting a large flat horizontal capstone (table), although there are also more complex variants. Most date from the early Neolithic (4000â3000 BC).