The monastery of Archangel Michael is located on the road between the villages Astrida and Aliki. It is one of the most important sights of Thassos and is distinguished by a piece of Fair nails (some of the nails of the crucifixion of Christ), kept at home. The uniqueness and because of this reason relics were of high turnout of pilgrims. The believers dedicated to listing the names. In 1974 monks who came with a filotheiti monk worked hard and transformed the monastery, which until then had remained deserted. Since the Monastery of Archangel Michael works as a women's spiritual retreat depending Philotheou the monastery on Mount Athos.