Geoglyph

A geoglyph is a large-scale man-made feature on the ground. Usually longer than 4 metres, it is made by placing rocks, stones, live trees, gravel, or earth.

Geoglyphs on deforested land in the Amazon rainforest.

A positive geoglyph is formed by the arrangement and alignment of materials on the ground, while a negative geoglyph is formed by removing material to expose bare ground.

Bunjil geoglyph at the You Yangs, Lara, Australia, by Andrew Rogers. The creature has a wingspan of 100 metres and 1,500 tonnes of rock were used to construct it.