The area of the archaeological site has been explored at the beginning of this century, but the first excavations took place in 1959. The perimeter of the walls is delimiting the ancient city in the East-West axis. On the south side of town, along the river, a steep ravine strengthened the defense of the city. The north side of the site is buried under modern buildings and constructions. The walls were built of ashlar stones of basalt and are in good condition on the east side. In the northeastern edge of the wall the existing rectangular tower is incorporated in St. Francis Church.
It seems that the Adranon region was inhabited in prehistoric times, as shown by recent findings of the Neolithic period in districts of the modern city. Traces also have been found of indigenous peoples human settlements during historic era. Not yet excavated, except for a small part, there is a native town of Mendolito region, connected to Adranon's topography, whose name remains unknown to date. According to Α. Franco this anonymous settlement of Contrada Mendolito is identified as Piakos,. G. K. Jenkins who published a coin with the obverse legend ΠΙΑΚΙΝΟΣ and ΑΔΡΑΝ on the reverse, recognized ΑΔΡΑΝ as ΑΔΡΑΝΟΝ, a numismatic evidence of connection between Piakos and Adranon. Other researches identify ΑΔΡΑΝ as ΑΔΡΑΝΙΤΩΝ, the ethnic in the genitive case. Important are the findings of the eighth or seventh century BCE, which include among others a treasure-trove of bronze artefacts and a gate of the city of 6th century BCE, with a Sicel inscription not yet deciphered. Several other finds in the area are now in the Archaeological Museum of Ardano. The exact location of the Temple of Adranus, whose cult probably linked to the activity of Etna, is still unknown. Sixteen basaltic pillars are now part of the internal structure of contemporary temple Chiesa Madre, standing next to the Norman castle in Umberto I Square. Therefore, it has been hypothesized that the temple of the Adranus is in the same area. Among other finds, the settlement of Politselo region yielded a wonderful sample of Sicilian art of the fifth century BCE, the bronze figure of a naked athlete. Excavations of classical strata revealed so far residences of the 4th century BCE, with Italiotepotteryred-figure of good style, and interesting treasure of modern currencies. No other monument of the city is yet known. The polis minted coins during Timoleon's rule with the figure of Adranus the river deity. Two successive excavations have investigated the walls and part of the ancient cemetery lying southeast of the city. The graves belong to a type uncommon in Sicily, consisting of small circular structures in the lava stone that are vaguely reminiscent of Mycenaean domes.
