This term refers to the coastal land, intertidal zones and underwater slopes forming the coastal zones. The various landforms in coastal areas are mainly formed by waves, tides and currents. They can be grouped into coastal erosion landforms, such as cliffs, caves, notches, arches, and wave-cut platforms, and depositional landforms, including beaches, spits and bars, underwater dams, terraces, lagoons and lakes. Tectonic activity and climate change cause the uplift and subsidence of coastal zones, which can destroy or preserve ancient coastal landforms on land or underwater. Coastal landforms can be classified into three types: bedrock coasts, muddy coasts, and biological coasts. Coastal landforms are important tourist destinations.