In the suburb of Vouliagmeni, about 2 km from the center of Athens. The Lake Vouliagmeni is one of the most impressive natural sights of Athens. It is a salt lake whose depth or connection to the sea have not been discovered before. The temperature of the lake always remains constant between 20 and 27 degrees Celsius. The lake has a coffee and snack bar that stays open until 2 pm Outside the boundaries of Lake Vouliagmeni is with cafes, taverns, restaurants, etc. The lake is open from 8 am until sundown.