Three caves are of incomparable beauty in Astypalea.The Negro’s Grotto (cave of Negros) at VatsesThe Cave of Negrou at Vatses has impressive stalactite and stalagmite formations that are interwoven with myths about pirates and the treasures they buried there. From the beach you can hike (45 mins) to the cave, or you can also reach it by boat.The Cave of the Dragon at VathiTo the north of the island, north of Mary Thomas, is the cave of the Dragonin Vathi with impressive stalactites and stalagmites. You get the Vathi by boat or by foot (about 2 hours).Cave of Panagia Poulariani at AnalipsiThe tallest mountain in the north of the island, is Kastelanno Mary Thomas. The Virgin Mary with Christ in arms said to form the rock of the church.It is the most beloved church of the residents of Astypalea. On February 2 each year, the feast of the Presentation of Christ is the most important festival of the island. It is a whitewashed church surrounded by additional auxiliary buildings as well. Tradition says that in a small cave next to the church was once a shepherd of the icon who moved to town and returned the next day saw the cave again. The story was repeated until it was decided to build the monastery.