An island with crystal beaches and lush greenery, Thassos is the northernmost island of the Aegean Sea, very close to the coasts of the mainland. Ideal for family and relaxing holidays, Thassos island has gorgeous beaches, either organized or totally secluded. The mountainous villages in the inland have traditional architecture, with stone houses, paved streets and grey-tiled roofs. The surrounding landscape is great for trekking with paths leading to abandoned places, castle ruins and caves. The most interesting sightseeing in Thassos Greece is the Ancient Agora, while the Monastery of Archangel Michael offers breathtaking view to the Aegean Sea.