Earthworks are large-scale constructions made by moving soil and rock to create various shapes and structures. These can include things like ditches, embankments, and mounds. Earthworks are often used in civil engineering projects, such as building roads, bridges, and dams, to help manage water flow and improve land use. In addition to practical uses, earthworks can also have cultural significance. Many ancient civilizations, like the Mound Builders in North America, created impressive earthworks for ceremonial purposes or as burial sites. Today, these historical sites are studied by archaeologists to learn more about past societies and their interactions with the environment.