Trethevy Quoit, England
Trethevy Quoit is a well-preserved Neolithic dolmen tomb, known locally as ‘The Giant’s House,’ located between St. Cleer and Darite in Cornwall, England. It was erected during the Neolithic period between 3700-3500 BC. Like other portal tombs of this type, Trethevy Quoit was originally covered by a mound. At the upper end of the cover slab is a natural hole, which may have been used for astronomical observation.