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Geoglyphs and Earthworks

See ancient designs shaped into soil, stone, and terrain—works whose full scale is often clearest from far above or across the landscape.

4 sites in this category

Geoglyphs of Acre

Hundreds of geometric earthworks revealed by Amazon deforestation. Squares, circles, and octagons carved into hilltops, rivaling Stonehenge in scale.

Geoglyphs etched into a desert plateau, only fully visible from the air. Hummingbird, monkey, spider, and dozens more.

Concentric earthen ridges in Louisiana built by hunter-gatherers. Among the largest earthworks ever made by a non-agricultural society.

Quarter-mile effigy mound in Ohio shaped like an undulating serpent swallowing an egg. Aligns with the summer solstice sunset.