It is administratively a part of Kaş ilçe (district) of Antalya Province at 36°12′53″N 29°21′17″E / 36.21472°N 29.35472°E / 36.21472; 29.35472.

[1] At the past it was one of the Xenagorou islands (Ancient Greek: Ξεναγόρου νῆσοι).

[2][3] The uninhabited island is a long island where the longer dimension (south west to north east) is over 2 kilometres (1.2 mi).

The shortest distance to the main land (Anatolia) is about 1.5 kilometres (0.93 mi).Sıçam Island, a smaller island is to the north east of Yılan Island.

The deep sea to the southern shore of the island is ideal for underwater sports.