It means coastal land, seashore, coastal territory. Strip of land that lies on the shores of the sea, beach, coast, margin, riba.
COAST: Costa of a sea, country or territory.
they are the cracks and fissures created by the waves of the sea to hit a cliff. The force that may cause is visors on the rocks. When the base of the rocks is worn surface it first and there are holes and at high tide, the water comes out.