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

agia marina petrified forest turquoise water southern greece beach rocks cliffs nature landscape geological formations coastline serenity crystal clear outdoor travel summer vacation scenic picturesque tourism marine recreation exploration natural beauty hiking relaxation sunbathing sky tide pools colors environment geology ecology sunlight tranquil coastal view wildlife seascape adventure discovery culture