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

agia marina petrified forest beach turquoise water southern greece coastal scenery rocks nature cliffs outdoor adventure landscape vacation travel summer clear marine beauty geology tourism relaxation wilderness sunshine hiking swimming natural wonders unique environment biodiversity scenic views serene blue skies historic site pristine tranquility coastline exploration wildlife sands culture beachcombing