All events – from ghost tours to spooky tales and trails - can be found on Cadw’s website, with a glimpse of the packed autumn calendar below.
Mae’r holl ddigwyddiadau – o deithiau tywys arswydus i straeon llawn ysbrydion – i’w gweld ar wefan Cadw, ac mae blas o galendr yr hydref ar gael i chi isod.