Porth Neigwl

Porth Neigwl, also known in English as "Hell's Mouth", is a broad bay, about 5 km or 3 miles wide, on the south coast of the Llŷn Peninsula in North Wales.

The bay faces south-west and lies between the headlands of Mynydd Rhiw to the west and Mynydd Cilan to the east. These craggy headlands have cliffs descending to the sea, and Porth Neigwl is said to be like a broad open mouth in the relief of south Llŷn. The name "Hell's mouth" was given for that reason and because of its danger to sailors in times of storm, with great waves and a lack of shelter.