Was it a pipe dream? Experts seriously doubt Canadian teen William Gadoury’s widely reported “finding” of an ancient city in Mexico. It appears the youth did not, sitting at his computer and studying satellite images and pre-Columbian star charts, locate a centuries-hidden 282-foot pyramid. First, the spot is already near a known archaeological site. Second, the “pyramid base” is more likely a fallow marijuana field, a Mesoamerican archaeologist has declared, so the lost city of K’aak Chi, as the teen dubbed it, will likely become the stuff of legends.