We often find these rock-cut basins along the beach. They are formed by the action of sea water currents causing small boulders to move in a circular motion or vortex. The friction created by this circular motion erodes the rock to create concavities that increase in depth and circumference over the years.
Of course – there are several beliefs associated with these natural basins. Some people believe them to be prehistoric, related to the cup marks found in different locations across the island whilst others think that they are bait holes, used for grinding shellfish such as limpets in order to attract fish. Another theory is that they were used for offerings in order to help the safe return of people out at sea.
Whether you think of them as natural or mythical in this low winter light they create beautiful shadows and textures.