An unusual and extremely large antenna consisting of a 500-foot-long flat array, built on the ground, and two vertical reflectors on either end. Built by Ohio State University, it became the first dedicated SETI (Search for Extra-Terrestrial Intelligence) facility in 1973, and recorded the "WOW" signal that further provoked interest in the SETI project. It was dismantled in 1998 to make way for a golf course.