Keçi Bükü is a gem. The slopes about are covered in pine. The small village of Orhaniye is hut in by bookends of steep rocky slopes. A stream keeps the enclosed valley well watered, and the small coastal flat green through the summer. Inevitably, this has attracted the developers and hotels are now being built nearby locations. The area around Keci Buku and Orhaniye has some interesting ancient associations. To the north on the flat plain at the head of the gulf lies the village of Hisarönu, from which the gulf takes its name. In antiquity it was called Bybassus and on a rocky outcrop nearby the remains of the acropolis can be seen, but little else remains.
Like the other cities in this area, Bybassus was part of the Rhodian Paraea and was important for its association with a temple complex to the south. It is likely that Keçi Bükü was the ancient harbour for Bybassus and a landing place for those making a pilgrimage to the temple. Around Keçi Bükü itself there are a few ancient ruins on the eastern side of the inlet and the fortified structure on the islet. The latter may have had ancient foundations, but is more than likely of Medieval origin.