Yılan Island or Da Vinci Island (, literally "Snake Island") is an Aegean island of Turkey. It was formerly known in Greek as Nisida Erimo (Νησίδα Έρημο).
Administratively it is a part of Urla ilçe (district) of İzmir Province at .Map page It is almost at the center of Gülbahçe bay. The distance to the nearest point at the main land is about . The longest dimension of the uninhabited island is about .
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