Border wall construction destroys ancient 7,000-year-old desert geoglyph
Construction equipment on the U.S.-Mexico border ran over the Las Playas Intaglio, a massive fish-shaped geoglyph in Arizona's Sonoran Desert that may be up to 7,300 years old.
During the ongoing construction of the border barrier, heavy machinery crossed the Las Playas Intaglio, a large fish-shaped geoglyph located in Arizona's Sonoran Desert. The figure, about 83 meters long, was created by ancient peoples who stripped away a dark surface layer to reveal lighter soil and rock beneath. Scientists David S. Whitley and Ronald I. Dorn applied a soil-layer micro-stratigraphy technique to samples originally collected in 1979, concluding the geoglyph dates to roughly 6,500-7,300 years ago, making it one of the oldest dated geoglyphs in the Americas.
The artwork was significant to Indigenous communities, including the Tohono O'odham and Hia-Ced O'odham, as a cultural and spiritual landmark. Tribal leaders described the destruction as an irretrievable loss of heritage. Conservationists warn that the wall could threaten additional sacred sites, such as Quitobaquito Springs, raising broader archaeological and environmental concerns.
Why it matters
The loss erases a rare millennia-old cultural artifact and highlights risks to Indigenous heritage from large-scale infrastructure projects.
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