Agios Sostis beach, Serifos Island, Cyclades, Greek Islands, Greece, Europe

greece beach turquoise water golden sand sun summer vacation travel nature coastline landscape hills relaxation swimming sunbathing paradise scenic marine beauty outdoor activities clear skies vibrant colors mountain greenery crystal clear sandy shore waves serenity tourism island life picturesque seascape tranquility holiday exploration marine life popular destination hiking panoramic view sunny day warm climate coastal exploration uncrowded beach natural beauty pristine waters idyllic spot