Below the marble quarries, on the eastern slope of the mountain, is one of the "balconies" of Paros: the village of Kostos. It is a small, quaint village with white houses, churches and narrow streets calling out to visitors to take a short walk. Sites include the church of Agios Panteleimonas, the patron of the village, which is situated next to a little park. The churches of Agia Marina and Anastasi are also found in the village. Visitors often stop and admire the view over the bay of Molos and the neighboring island of Naxos. The home of the great teacher Athanasios the Parian, who was born in the village, has been preserved and is open to the public. The monument dedicated to him can be found in the center of the village. The old wash houses, which were recently restored, can be found on the outskirts of the Kostos. The settlement of Marathi is nearby. There is a path leading from the settlement to the ancient quarries.
Kostos hosts three festivals, on 24 June in the memory of Athanasios the Parian, on 17 July (Agia Marina) and on 27 July (Agios Panteleimonas).Kostos hosts three festivals, on 24 June in the memory of Athanasios the Parian, on 17 July (Agia Marina) and on 27 July (Agios Panteleimonas).