The Vouliagmeni district stretches along the coast of the Saronic Gulf and includes the Kavouri peninsula with its hotels and restaurants on the sea front, and the Laimos area which was considered to be one of the most cosmopolitan areas in Attica for many years. The name Vouliagmeni comes from the beautiful lake with its thermal waters and its labyrinthine underwater caves. It has been declared a protected natural monument and belongs to the NATURA 2000, the pan-European network of protected areas. A spa with complete supporting facilities operates at the lake.