Seskli is a small uninhabited island 1km south of the southern tip of Symi, not far from Panormitis Monastery.
It can only be visited by boat. You will definitely enjoy the tranquility this place offers.

The island has a beautiful shoreline for swimming and is surprisingly green, with a variety of vegetation supporting a vigorous bird life, including partridge which in turn attracts raptors. It has a pebble beach with very clear water and plenty of trees for shade.

There is archaeological evidence of human presence from many different periods in history, including the Neolithic period (4th millennium BC). There is also a small Byzantine castle, erected on the site of an ancient tower which in turn seems to have been built in the premises of an ancient and more extensive fortification. There are also stretches of an ancient wall near the island's summit. 

There is not much to do, except relax in the sun, swim, explore the hillside or walk up to the chapel dedicated to St. Paul. It is said that Apostle Paul stayed on the island for some time, due to sea turbulence on its way from Kos to Rhodes. 
On the south side of the island there is an anchorage with good protection from the winds.