A beach is a landform along a body of water. It usually consists of loose particles, which are often composed of rock, such as sand, gravel, shingle, pebbles, or cobblestones. The particles composing a beach are occasionally biological in origin, such as mollusc shells or coralline algae.Some beaches have man-made infrastructure, such as lifeguard posts, changing rooms, and showers. They may also have hospitality venues (such as resorts, camps, hotels, and restaurants) nearby. Wild beaches, also known as undeveloped or undiscovered beaches, are not developed in this manner. Wild beaches can be valued for their untouched beauty and preserved nature.Beaches typically occur in areas along the coast where wave or current action deposits and reworks sediments.OverviewAlthough the seashore is most commonly associated with the word beach, beaches are also found by lakes and alongside large rivers.Beach may refer to: small systems where rock material moves onshore, offshore, or alongshore by the forces of waves and currents; or geological units of considerable size. The former are described in detail below; the larger geological units are discussed elsewhere under bars.