The famous Welsh passage tomb might not be as recognisable as Stonehenge, but it possesses a similar alignment where the stones line up with the sun on the longest day of summer.
Efallai nad ydi’r feddrod enwog o Gymru mor adnabyddadwy â Chôr y Cewri, ond mae ganddo aliniad tebyg lle mae’r cerrig yn cyd-fynd â'r haul ar ddiwrnod hiraf yr haf.