Gwrgan Fawr | Fforest Fawr | Rhinog Fawr | Puncheston | Llyn Arenig Fawr |
There is a nearby mountain known as Castly Bythe, or in english Cow Castle mountain.
The site is of special interest for its population of the internationally rare southern damselfly (Coenagrion mercuriale), which breeds in this small valley near Afon Anghof, above Puncheston.