The ancient Acropolis at the Castle is surrounded by a wall, parts of which are still visible nowadays. The wall is long and reaches the traditional village of the Castle which is inhabited until today. Recent excavations revealed parts that are over 4 m. high, and this gave some light concerning the period when the monument was constructed. Also, based on the excavations of the English School inside the Acropolis it seems that the beginning of its construction dates back to the late 6th century B.C.

Virgin Chrissopigi is the patron saint of the island. The monastery is built on a spectacular location, perched on a rock that penetrates the sea and separates Faros Bay in two. The whitewashed church was built in 1615 to house the painting of Zoodochos Pigi, which was found by fishermen in the sea.

The celebration of the Ascension is followed by a feast and all the inhabitants of the island celebrate together.

The trails, a unique network of about 200 kilometers, were created for the needs of the locals. Few of them date back to the third millennium BC and some of them are paved while others are just dirt roads. If you follow them they will take you to monasteries and chapels, monuments of popular culture such as wells, fountains, pigeon houses, ancient towers, mining ruins, threshing floors, lime-kilns and mills.

The castle is the old capital of the island and the seat of the Archdiocese of Sifnos (6th-19th century). It is one of the most picturesque and beautiful settlements on the island which reached its peak in the 6th century. It has been inhabited from the  prehistoric times (the first inhabitants settled here in the 3rd millennium BC) to the present.

The settlement has an ellipsoidal shape and a defensive character. There are two defense rings of buildings, one built near the other, with mansions in the inner ring and simpler houses in the outer ring.

Kamares village is located 5 km. from Apollonia. It is the port and the largest coastal settlement on the island.

In Kamares there are rooms to let, hotels, restaurants, grocery stores, bakeries, a private camping site, tourist offices, cafes, the Municipal Information Office, the Port Authority, Customs etc.

On the opposite side of Kamares there is the Church of St. Marina and the homonymous village with rooms to let, hotels, grocery stores, restaurants and cafés.