the.com/earthworks

means Large-scale art or construction made by shaping the earth itself — mounds, trenches, ridges — rather than adding a separate object onto the land.

from A straightforward compound of 'earth' and 'works,' long used in military and engineering contexts for defensive mounds, trenches, and ramparts built of soil (think 'siege earthworks'). In the mid-20th century, artists borrowed the term for the Land Art movement — Robert Smithson's Spiral Jetty and similar projects — repurposing a word once about fortification and labor to describe sculpture made directly from the ground.