Limonlu, known in antiquity as Antiochia Lamotis, is small beach town in the Mersin Province of Turkey. Limonlu is a coastal town by the Limonlu River (Turkish: Limonlu Çayı) situated in a part of the Erdemli district of Mersin Province. On the highway it is 9 kilometers or 5.6 miles from Erdemli, 38 kilometers or 24 miles from Silifke, which is another district center of the Mersin Province, and 45 kilometers or 28 miles from the city of Mersin. In antiquity the Limonlu River was the boundary between Cilicia Campestris and Cilicia Trachea, making Limonlu an important town on this border. The ruins of the castle is 1 kilometer or .62 miles north of town. The Byzantine Emperor, Manuel I Komnenos, captured the town in 1158, but lost it to the Armenian Kingdom of Cilicia. After Karamanid rule which lasted for two centuries, the Ottoman Empire captured the town in the late 15th century. Like most Mediterranean coastal towns, Limonlu cultivates fresh vegetables and fruits, but specialized in citrus production. Hence, giving the town its name which means with lemon. These days tourism has almost supplanted agricultural development as being the most important facet of the local economy. Along the 4 kilometer or 2.5 mile Limonlu coastal band, there are numerous summer houses owned by Turkish residents of Mersin or other large area cities. Along this coastal band there are also parts used for temporary tent camps during the summer.
Middle East Technical University in Ankara has a campus just east of Limonlu called the Mersin–Erdemli Campus which has been used by the Institute of Marine Sciences (Turkish: Deniz Bilimleri Enstitüsü) since 1975. The Institute of Marine Sciences provides graduate level courses in oceanography. A castle overlooking the sea on the Mersin-Silifke road and an old bridge made of hewn stones over the Limonlu River are the historical sites in the area that attract attention. It is believed that the castle belonged to the period of the Karamanoğulları, and the bridge probably also dates back to the same period.
The Limonlu River has historical importance, because it delineated the border between the mountainous Cilicia and the Cilicia of the plains. The Limonlu Canyon north towards Mersin is a beautiful forested gorge where many Turkish families come to enjoy a barbeque or a picnic, and the air is thick with the aroma of charcoal smoke. It is a very popular place for Turks wanting to escape the city and enjoy pristine nature.