Zavala Monastery, Serbian Orthodox monastery in Popovo Polje, Bosnia and Herzegovina.

Zavala Monastery is a Serbian Orthodox monastery in the village of Zavala, on the southwestern edge of Popovo Polje in Ravno municipality, Bosnia and Herzegovina. Its church, dedicated to the Presentation of the Virgin, has its northern wall set into a natural cave in the rock. The complex includes the church and monastic dormitories.

Written records first mention the monastery in 1514, though local traditions point to an even older founding during Emperor Constantine's reign. The unclear origin suggests this has been a sacred site for many centuries.

The monastery is dedicated to the Presentation of the Virgin Mary, and its church interior was painted in 1619 by Georgije Mitrofanović, a monk of Hilandar and a leading Serbian fresco painter of the 17th century. The monastery is also known as the place where Basil of Ostrog took monastic vows; he was born in the nearby village of Mrkonjići.

Zavala Monastery lies about 50 km northwest of Trebinje, in the village of Zavala at the western end of Popovo Polje, at the foot of Mount Ostrog. A one-way asphalt road reaches it, following the route of a narrow-gauge railway built during Austro-Hungarian rule; the old station building still stands in the village. From the west it can also be reached by asphalt road from Ravno, and a narrow asphalt road links Poljica to Mrkonjići and the main Trebinje–Ljubinje–Mostar road.

The monastery incorporates a natural cave as a structural component, blurring the line between geology and architecture. This unusual approach shows how ancient communities wove their surroundings into sacred spaces.