Concepts for conveying long-term nuclear warning messages on nuclear waste sites for future civilizations, from a 1992 report by Sandia National Laboratories for the US Department of Energy for the Waste Isolation Pilot Plant (WIPP).

The Sandia report explored designs for physical markers which conveyed the concepts of dangerous emanations, shapes that evoke bodily harm, and the concept of “shunned land” that appears destroyed or poisoned. The named designs suggested included:

Landscape of Thorns, Spike Field, Spikes Bursting Through Grid, Leaning Stone Spikes, Menacing Earthworks, Black Hole, Rubble Landscape, and Forbidding Blocks.


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