Ayios Petros Tower at Ano Ayios Petros. Cylindrical tower, built from slate. The tower sits on a 9.40-meter diameter base and extends to 20 meters. It's believed to date from the fourth or third centuries B.C. or even the Mycenaean period.Makrotantalos Tower. The structure is also sometimes referred to as the Castle of Ostodosia. It's a typical example of Venetian defensive architecture on the island. The tower is located at the rocky end of Pyrgos beach on the northern tip of the island's western coast. Vryokastro at Varidi. Sections of the island's fortifications are preserved here. The walls protected inhabitants from raids. Kastellaki at Gides. Small fortifications opposite the Kalokairini settlement. Fryktoria in the Ayia Marina area at Makrotantalos. Tower used to relay messages across the Aegean; only a section of its base is preserved.
Monastery of Zoodohos Piyi. The Monastery of Zoodohos Piyi (Life - Giving Source), also known as Moni Ayias, is located at Kapsorahi along the route linking Batsi to Gavrio. It's one of the oldest monasteries in the Cyclades.
Byzantine - era Monastery of Sotiros in the Vitali district
Archaeological site of Palaiopolis. Excavations initiated in 1830 uncovered, two years later, the Hermes of Andros - a headless female sculpture removed to the National Archaeological Museum in Athens.
Archaeological Museum of Palaiopolis: the museum has interesting finds from sites around the island. Ancient Zagora. The ancient settlement of Zagora is located on a remote mountain plain, about 160 meters above sea level, on the Zagora peninsula. Ypsili Archaeological Site (also known as Aprovatou). Excavations have unearthed ruins of an ancient settlement and a fortified acropolis with an Archaic temple.Apoikia and the Sariza mineral springs.
Apatouria village, with its arched stone bridges, rustic cottages, and lush Pythara ravine.