Effigy mound: An effigy mound is an earthwork created in the shape of an animal or object. They were built by Native American cultures for various purposes such as burial sites or ceremonial grounds.
Geoglyphs: Geoglyphs are large-scale designs made on the ground surface using rocks or other materials found in the landscape. They can be found in various parts of the world and often have cultural or religious significance.
Petroglyphs: Petroglyphs are rock carvings made by removing part of a rock's surface to create designs or symbols. They were created by ancient cultures as a form of communication or artistic expression.