Momina Kula is a Late Antiquity and medieval fortress, situated in the Momina Klisura Gorge along the river Mesta near the village of Kremen in Blagoevgrad Province. It is situated on a peak with vertical cliffs to the north, east and south. The only access is to the west where the walls are preserved at their entire length at the height of 5 m. To the east are located the remains of a quadrangular tower.
