Chios is the fifth largest of the Greek islands, situated in the northern Aegean Sea. The island is separated from Turkey by the Chios Strait. Chios is notable for its exports of mastic gum and its nickname is "the Mastic Island". Tourist attractions include its medieval villages and the 11th-century monastery of Nea Moni, a UNESCO World Heritage Site.
The town of Vrontados is home to a unique Easter celebration, where competing teams of locals gather at the town's two (rival) churches to fire tens of thousands of homemade rockets at the other church's bell tower while the Easter service is going on inside the churches, in what has become known as rouketopolemos.