This award-winning museum offers an experience unparalleled in the country, and one of only two sites in the UK where visitors can go underground in an original coal mine.
Mae’r amgueddfa lwyddiannus hon yn cynnig profiad unigryw yng Nghymru a dyma un o ddim ond dau safle yn y DU ble gall ymwelwyr fynd o dan y ddaear i bwll glo gwreiddiol.