The island of Sifnos (gr. Σίφνος) belongs to the Western Cyclades. Sifnos is a rather quiet island on which you can relax very well. You reach the island regularly from Piraeus, and not so often by the other Cyclades islands. In summer, there is a ferry directly to Paros / Naxos.
The seaport of Sifnos is Kamares. Here are some restaurants, rooms and a beautiful beach. Kamares offers itself as a starting point for the remaining places on the island, as they well with the bus or small boats.