The Cyclades Islands are former volcanoes. The results of former volcanic activity are the black sand beaches of Santori and the multi-colored pebbled beaches of Milos. On Syros Island, there is the Church of the Assumption with a very early work of El Greco. You can go to Lito, on Mykonos Island, and see ruins from the Hellenic period. There, too, at Portes, are the ruins of an ancient castle. If you prefer not to hike or climb, visit Platis Gialus. There are many things to do in Platis Gialus and in the Cyclades Islands. Platis Gialus tourism touts the three beaches separated by a headland. The major Platis Gialus attractions include the beaches of Psarou, Aghia Anna and Platis Gialus. This is beach Platis Gialus culture. For other cultural opportunities, go to the Byzantine Museum in Naxos Town. You can go shopping in Platis Gialus near the beaches or venture to the major towns in the Cyclades chain. With so many islands to explore, plan to spend more than a weekend in Platis Gialus.