Nisyros is a beautiful Island with a volcano and a visit to the craters is definitely worth it. The largest crater is called Stefanos and is up to 300 and 250 meters wide. The volcano on Nisyros is not an active, but a living one!
Greece - Island Nisyros, small village called Nikia
Giola Lagoon/Thassos-Greece The Giola is a beautiful natural lagoon, like a swimming pool carved into the rocks. The water is warmer than the sea, which makes it pleasant for swimming. The place is unknown and the access there is difficult.