Days of Ajvatovica in Prusac/Donji Vakuf
Each June, pilgrims converge on the Ajvatovica shrine near Prusac for a horseback procession and an open-air prayer built around a centuries-old legend of a rock splitting to release water during a drought. Banned under Communist Yugoslavia and revived only in 1990, the gathering functions as a living religious pilgrimage rather than a tourist spectacle, and outside visitors are welcome mainly as respectful observers of an active act of worship.
A Sufi dervish remembered as Ajvaz-dedo is said to have prayed for forty nights before a rock face near Prusac split open and released water during a drought, in a story dated to 1510.