Giola Thassos is a stunning natural lagoon, like a swimming pool fixed into the rocks. The water is slightly warmer than the sea, which makes it enjoyable for swimming. The place is unfamiliar and the access there is difficult. The view was truly charming and the only thing somebody could hear was all the kind of exclamations. If you visit Athens make sure to stop by the Island of Thassos and experience this wonderful lagoon for yourself.