About the

Lake Vouliagmeni, in the heart of the Athenian Riviera, is the hidden treasure of Attica’s nature. Situated in an idyllic landscape, this rare geological phenomenon is waiting to be discovered. The brackish water of the Lake, which is continuously replenished both by the underground thermal springs and the sea offers a natural and unique thermal spa experience.

The geological

The imposing rock, thermal waters, the labyrinthine underwater tunnels and the lush vegetation compose an unmatched geological phenomenon. The Lake took its present form after the roof of its cave fell because of erosion caused by the high temperature of the running water. The Lake is part of the National NATURA 2000 list and characterized by the Ministry of Culture as a Site of Outstanding Natural Beauty.

The labyrinthine cave

At the edge of the Lake, near the rocks, a labyrinthine underwater cave with four tunnels begins divided in four independent caves. The largest of them is pure magic. It has been explored up to the length of 700 meters as its end is yet to be discovered. For the exploration were used 3.000 meters of diving string. Its dimension rises up to the 2.0000.000 c.m.. It is the largest undivided tunnel in Europe and definitively one of the biggest in the world. The discovery of a huge stalagmite in the cave has opened up new theories in the research of the formation of the Mediterranean Sea.

The living world

The aquatic paradise of Lake Vouliagmeni hosts in its emerald green waters a variety of unique organisms. Among them, a kind of sea anemone called Paranemonia Vouliagmeniensis stands out, as well as species of sponges and molluscs which portray the perfect balance of the Lake’s ecosystem. Its aquatic world also includes the well known Fish Spa which offer skin exfoliation.