Greek archipelago (also known as Cyclades) of over 200 mountainous islands in the southern Aegean Sea with a total area of almost 2,600 km². In ancient times, the island of Delos, which lies in the centre but is no longer inhabited, was one of the most important cult sites in Greece. The ring-shaped arrangement of the other islands led to the name Cyclades (ring islands). The islands outside this circle were called Sporades (the scattered ones). The group stretches from Euboea in central Greece about 200 kilometres to the southeast. Around 20 of the islands are of major tourist importance. Vineyards are also cultivated on some of the islands. However, only Paros and Santorini are important in this respect with protected POP areas. Other vineyards are on the islands of Tinos, Mykonos, Naxos, Sikinos and Syros.