Snake Island, also known as Serpent Island or Zmiinyi Island, is an island belonging to Ukraine located in the Black Sea, near the Danube Delta, with an important role in delimiting Ukrainian territorial waters.
The island has been known since classical antiquity, and during that era hosted a Greek temple to Achilles. Today, it is administered as part of Ukraine's Odesa Oblast.
The island is populated, reported to have under 30 people in 2012. A village, Bile, was founded in February 2007 with the purpose of consolidating the status of the island as an inhabited place.
Wikipedia https://en.wikipedia.org/wiki/Snake_Island_(Ukraine)
Coordinates 45°15'17.728" N 30°12'13.228" E