A potential clue to the Panionium's location was the discovery of an inscription in the area in 1673. Theodor Wiegand discovered a site at the end of the 19th century, and it was excavated in 1958 by Kleiner, Hommel and Müller-Wiener. It is located 17 km south of Kuşadası, near Güzelçamlı, on the north slope of Mt. Mycale, on the top of a low hill called Otomatik Tepe (machine-gun-hill), overlooking the sea.