it disappeared. Now, NPR reports that another one showed up in Romania. This has got to be one of the best practical jokes of the century so far.
Or maybe the mayor of the Romanian city where it showed up got it right:
"My guess is that some alien, cheeky and terrible teenagers left home with their parents' UFO and started planting metal monoliths around the world. First in Utah and then at Piatra Neamt, I am honored that they chose our city."
Move over, Dracula.