Agathonísi is a small Greek island and municipality located at the northernmost point of the Dodecanese in Greece. It is surrounded by many smaller islands and is home to two villages, both inland; Megalo Chorio, and Mikro Chorio. Between them is the small settlement of Agios Georgios, which forms the island's only harbor and consists of a few …Agathonísi is a small Greek island and municipality located at the northernmost point of the Dodecanese in Greece. It is surrounded by many smaller islands and is home to two villages, both inland; Megalo Chorio, and Mikro Chorio. Between them is the small settlement of Agios Georgios, which forms the island's only harbor and consists of a few hotels and restaurants. The island is also locally known as Gaidaro, or by its ancient name Tragea.