Wikipedia
Osmaneli
Osmaneli is a town and district of Bilecik Province in the Marmara region of Turkey. In 2010 its population was 13,816. The mayor is Mustafa Selahettin Çetintaş ( AKP). Its neighbours are Pamukova from north, Geyve from north-east, Gölpazarı from south-east, Bilecik from south, Yenişehir from south-west and İznik from west.
Situated on a hillside at a point where the Karasu, flowing down from Kandilli Dağ, enters the Sakarya, this small town was known in antiquity as Leukai and more recently as Lefke. South of the town is a narrow and very beautiful river gorge with rocky walls up to 100 m/328 ft high, contributing to some spectacular scenery.