You are hereChapel Porth
The giant Bolster is said to have terrorised the area until he fell in love with St Agnes. She asked him to prove his love to her by filling a hole in the cliffs at Chapel Porth with his blood.
This was deemed an easy task by the giant but the hole led to the sea, and the giant duly poured his lifeblood into the hole and died of blood loss.
There is a red stain in the area said to be the blood of the giant.