Petrified forest, Agia Marina, Agios Nikolaos Geopark, beach with turquoise water in the south of Greece, Greece

agios nikolaos agia marina beach turquoise water petrified forest geopark southern greece rocks coastline natural beauty relaxation exploration landscape nature summer vacation travel scenery outdoor tourist destination geology clear sunny day shoreline waves marine picturesque crystal sand rugged cliffs tranquil scenic holiday blue sky earth tones serene peaceful visitor attractions