Vidronisi, a tiny lake island in northern Greece, may not be widely known but, even so, is relatively easy to reach yet out of bounds. Situated on the Greek side of the Small Prespa Lake between Greece and Albania, the islet, occasionally referred to as Vidrinetsi by locals, is under the administrative control of the Florina regional unit in northern Greece.

The Small Prespa Lake, the smaller of the two Prespa lakes, hosts two islets, Vidronisi and Agios Achilleios, the latter usually being the main attraction for visitors, probably because Vidronisi is uninhabited. Vidronisi is full of protected bird species activity, offering a very picturesque setting. Besides the fact that any human attempt for settlement on this islet, measuring less than one square kilometre, would prove difficult, Vidronisi has officially been declared a protected habitat, serving as a sanctuary for rare fauna. The islet is not just uninhabited, but all forms of human activity are forbidden on the islet and its surrounding waters.

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