It is located in Demirtaş Neighborhood of Toroslar District, Mersin. Yumuktepe, which occupies an outstanding place in Archeology, has hosted an uninterrupted settlement since the Neolithic Period. The first excavations were initiated by John Garstang in 1937. Even though the Islamic layers were destroyed during the construction of park sites at Yumuktepe, which is better known for its prehistoric settlements, it was found out that it was an important citadel surrounded by fortification walls in the 10th and 13th centuries, in at least three construction layers. Archeo-botanical analyses revealed that olive and fig were native to this region, and grapes were introduced to the region in later periods. While determining the trade routes around the region, advancement in production technology was proved for the period beginning from 7000 BC. For the period after 5000 BC, on the other hand, a citadel surrounded by fortification walls and residences placed on terraces on the outskirts of the citadel were unveiled. Fortification walls surrounded Yumuktepe after the Chalcolithic Period. It is also understood that strong walls were added during the Hittite Empire. These walls protected the city until 1200 AD. The city was destroyed in a huge fire in that period. A large array of excavation findings is exhibited in Mersin Museum.