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

agia marina agios nikolaos beach blue sky cliff crystal clear geological formations greece rocky shore seaside turquoise water vacation summer exploration relaxation nature scenic view holiday outdoor activity sunny day unique landscape coastal geology tranquility beauty marine island sunbathing swimming tourism culture adventure park natural wonder site mediterranean environment ecosystem