Where are the largest earth works in the world?

The largest earthworks in the world are primarily found in the United States, with notable examples including the Great Serpent Mound in Ohio and the Cahokia Mounds in Illinois. Other significant earthworks can be seen in South America, such as the geoglyphs of the Nazca Lines in Peru. Additionally, the Yangshan Quarry in China and the ancient burial mounds of Europe showcase impressive earth-moving efforts. These sites demonstrate the monumental labor and engineering skills of ancient civilizations.