Chios is an island in Greece located in the northern Aegean Sea. It ranks as the fifth largest Greek island and the tenth largest island in the Mediterranean Sea. The landmass is separated from the Anatolian mainland by the Chios Strait.
The island is widely known as "the Mastic Island" due to its notable exports of mastic gum. Key tourist attractions on the island include various medieval villages and the 11th-century monastery of Nea Moni, which is designated as a UNESCO World Heritage Site.