One of the most disturbing projects I have ever seen:

Expert judgment on Markers to Deter Inadvertent Human Intrusion into the Waste Isolation Pilot Plant

And one of the incredible markings associated with the effort to deter human and alien intrusion:


THIS PLACE IS NOT A PLACE OF HONOR
NO HIGHLY ESTEEMED DEED IS COMMEMORATED HERE
NOTHING VALUED IS HERE
THIS PLACE IS A MESSAGE AND PART OF A SYSTEM OF MESSAGES
PAY ATTENTION TO IT!
SENDING THIS MESSAGE WAS IMPORTANT TO US
WE CONSIDERED OURSELVES TO BE A POWERFUL CULTURE