Ruins of strong defensive enclosure, public buildings and churches which date back to the Hellenistic and the Roman period are preserved on the SW part of the island, on the hill of Agia Marina. They can be accessed through a path that begins from the Diocese and passing by Pigadia of Manalis (the Wells of Manalis) it ends up to the country church of Agia Marina which is located on the peak of the same hill. The view from the specific spot both towards the inland of Sikinos and the open sea is amazing. Ios, Santorini, Folegandros, Milos and Kimolos can be seen clearly. And when the weather is clear, the mountains of Crete can be slightly seen on the southern horizon.