Hendrefor Burial Chambers is in Anglesey, Prehistoric Anglesey Burial Chambers.
Hendrefor Burial Chambers [Map]. Two stone chambers, 7 metres apart, which would once have been buried under a single long mound. One was recorded as intact in 1802, but by 1825 only one upright remained standing, which remains 2.7 metres (8.9 ft) high.