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

agia marina agios nikolaos geopark beach turquoise water southern greece petrified forest nature landscape rock formations serene vacation travel relaxation coast geological features sun clear sky marine life outdoor scenic beauty paradise exploration hiking tourist destination coastal area summer discovery pristine terrain unique adventure crystal sea rocky shore tranquility idyllic