Ahmet Dursun Karakuş Castle
The length of the walls of the castle, which was built on a high hill, is 250 m. Its height is 30 meters.
Although it is not known for certain by whom it was built for the first time, it is believed to have been built during the Roman Period.
There are secret roads from the castle to Kızılırmak. Horasan mortar was used in the castle walls. There is a bath ruin built by carving rocks inside the castle.
In the front part of the castle there is an inscription, an observer place, a gate and remains of bastions.
On the top of the castle, there are the remains of the foundations of houses left in the not so distant past.
The castle, whose height is clearly visible in both Ainsworth's and Bozoklu Osman Şakir Efendi's engravings, was once home to 200 houses.
The number of houses outside the city did not exceed 80. According to Evliya Çelebi, the castle was 800 meters in circumference and had an iron gate.
There are various opinions about the construction date of the castle. Although it is traced back to the Hittites by some, according to some rumors, it must have been built during the Umayyad raids that battered Byzantium. However, these ideas have not been finalized.
While Evliya Çelebi said that there were 10 inns in Osmancık, Ainsworth, who passed through Osmancık in the 1840s; "... The contemporary city was a busy outpost city with 300 houses, 5 masjids, 1 inn and baths".