Patsayev

Mass Effect 2
A rock planet encased in frozen oceans, Patsayev is notable for the largest written message ever created by a human being. Andrei Kobzar, a disgruntled miner whose fortunes were spent prospecting for eezo, used the mass accelerator cannon of a local mercenary group's A-61 Mantis gunship to carve a 208-kilometer long message in the ice saying "Zdes' nichego net," Russian for "There's nothing here."

The message can easily be seen from space. Ironically, the message itself, intended to discourage future colonists, not draws small tourist crowds.

Mass Effect 3
A rock planet encased in frozen oceans, Patsayev is notable for the largest written message ever created by a human being. Andrei Kobzar, a disgruntled miner whose fortunes were spent prospecting for eezo, used the mass accelerator cannon of a local mercenary group's A-61 Mantis gunship to carve a 208-kilometer long message in the ice saying "Zdes' nichego net," Russian for "There's nothing here."

The message used to be visible from low orbit. Ironically, the message itself appears to have been melted away by another individual with heavy equipment, and now, truly, there is nothing here.