Ostrog Monastery is the most important pilgrimage site in Montenegro and one of the most visited Orthodox Christian monasteries in the world. Built directly into a vertical cliff face at 900 meters altitude in the 17th century, this remarkable monastery attracts over 100,000 visitors annually from all faiths. The monastery was founded by Saint Basil of Ostrog, whose relics are preserved in the Upper Monastery and are believed to have miraculous healing powers. The stunning white facade carved into the rock face creates an unforgettable sight, appearing to float against the mountain.