Attica has many small and tiny islets, scattered all over its coastline, but one of them is quite peculiar and absolutely stunning.

A 40-minute drive from downtown Athens and close to the town of Keratea, in Attica’s Mesogea, a rocky islet is located just off the coast, in a sea area known in Greek as ”Kakia Thalassa”, which literally means ”the Bad Sea”.

What makes this islet different from all the rest, is its geomorphology. Approximately one-fourth of its entire tract is sunken, with its edge touching the sea.

This weird shape has created a natural pool, which receives seawater when the tides are high.

The bottom of the sunken area is full of sand, making the islet a tempting destination for anyone who has a small boat or the strength to swim.