Akpara Kale is located 750 m southeast of Çukurca Village, in the east of Doğanlı Valley, Akpara Castle is the last castle in the northwest of a group of four castles ie. Pişmiş Castle, Kocabaş Castle, Gökgöz Castle.
See:
- Caroline Henriette Emilie Haspels, The Highlands of Phrygia. Sites and Monuments, Princeton 1971
- Yusuf Polat, The Phrygian Rock Cut Religious Monument, BAR International Series 1739, 2008