Knidos or Cnidus (/ˈnaɪdəs/; Greek: Κνίδος, Ancient: [knídos], Modern: [ˈkniðos]) was a Greek city of ancient Caria and part of the Dorian Hexapolis, in south-western Asia Minor, modern-day Turkey. It was situated on the Datça peninsula, which forms the southern side of the Sinus Ceramicus, now known as Gulf of Gökova. By the 4th century BC, Knidos was located at the site of modern , opposite Triopion Island. But earlier, it was probably at the site of modern Datça (at the half-way point of the peninsula).