Sea walls are structures built along coastlines to protect against the erosive forces of waves and storm surges. They are typically made of concrete, stone, or other durable materials and serve to prevent flooding and land loss in coastal areas. Sea walls can also help to maintain the integrity of beaches and coastal ecosystems. In addition to their protective function, sea walls can provide recreational spaces for activities like walking and fishing. However, they can also have environmental impacts, such as altering natural habitats and sediment transport. Proper design and maintenance are essential for their effectiveness and sustainability.