Santorini is a small group of Greek islands. They were formed due to a ___VOLCANIC___ eruption about 3,600 years ago. Volcanos are still very active in the area. Tourists can fly to Santorini or take a ferry and enjoy the ___NATURAL___ beauty in summer, when the islands are crowded and busy. In winter Santorini seems ___UNPOPULATED___ and ferry service is not regular. On one side of Santorini, ___VISITORS___ get a view of the local villages. This area is ___HIGHLY___ developed and rich. On another side of the islands tourists can enjoy black sand beaches and swim near the volcano. The third part of Santorini displays ancient ruins. Although this section is not popular among tourists, it is a well-known site for ___ARCHEOLOGISTS___. In fact, legends say that Santorini is the place where the lost civilization of Atlantis was once located.