Osmaniye sits between the Adana coastal plain and the Amanos Mountains — a transition zone with remarkable ecological diversity, from the sea-level Ceyhan delta to mountain forests above 2,000 m in less than 50 km.
The province is best known historically as part of ancient Cilicia — a region connecting Anatolia and the Levant that was fought over by Hittites, Assyrians, Persians, Greeks, Romans, Arabs, Crusaders and Ottomans over 3,000 years of recorded history.
- Region
- Southern Anatolia / Ceyhan Valley
- Key site
- Karatepe-Aslantaş — Neo-Hittite open-air museum (9th century BC)
- Mountains
- Amanos (Nur) Mountains — ancient Amanus range
- Known for
- Karatepe Hittite museum, Ceyhan valley, Amanos Mountains
Karatepe-Aslantaş Open Air Museum
Karatepe-Aslantaşis a Neo-Hittite palatial site from the 9th century BC, preserved in situ as Turkey’s only open-air archaeological museum of this type. The site contains two remarkable decorated gateways flanked by orthostat relief sculptures — lions, sphinxes, hunting scenes and mythological figures — in excellent condition. The bilingual inscription found here (Phoenician and Luwian hieroglyphic) was decisive in deciphering the Luwian script. The museum is set in a pine forest above the Aslantaş reservoir with pleasant picnic areas and walking paths between sculptures.
Aslantaş Reservoir and Ceyhan Valley
The Aslantaş Dam on the Ceyhan River has created a scenic reservoir 20 km long, surrounded by Amanos Mountain forests. The reservoir is used for fishing and small boat trips; the surrounding area has picnic sites and forest trails. The Ceyhan valley below the dam continues through the Cilician plain to Adana — a fertile agricultural belt famous for cotton and citrus.
Amanos (Nur) Mountains
The Amanos Mountains (Nur Dağları in Turkish, ancient Amanus) form the natural boundary between Anatolia and Syria. This mountain range has historically been a major natural barrier crossed by Alexander the Great, Crusaders and Ottoman armies. The forests above Osmaniye (oak, cedar, pine) are well-preserved and offer excellent hiking. The highest point, Keldağı at 2,240 m, has panoramic views over the Cilician plain to the Mediterranean and east toward the Syrian border.
Southern Anatolia in pictures
Frequently asked questions
Osmaniye
3By bus or train from Adana (45 min), Gaziantep (2 hrs) or Hatay (1.5 hrs). Osmaniye is on the main Adana–Gaziantep highway and rail line. From Osmaniye city, Karatepe-Aslantaş is 40 km northeast — a hire car or taxi is needed (no public transport to the site).
2–3 hours is ideal for a thorough visit. The site is compact but the sculptures deserve close attention — the relief carvings on the orthostats are exceptionally detailed. The forest setting and reservoir views add to the experience. Combined with the Aslantaş lake, a full half-day is worthwhile.
Yes — Osmaniye is only 90 km from Adana and an easy day trip. Combine Karatepe-Aslantaş (40 km from Osmaniye city) with a stop in Osmaniye city for lunch. The drive from Adana through the Ceyhan valley is scenic. Can also be combined with Hatay (Antakya) on a longer southern Turkey itinerary.