Lake Vouliagmeni is a saltwater lake located on the coast south of Athens, Greece, about 30 km southwest of Marathon. It is a popular destination among tourists and locals for swimming, relaxation and the therapeutic properties of its waters.The lake is located in a natural cave and is fed by underground thermal springs. The lake water is usually around 22-29°C, so it is perfect for year-round swimming. In addition, the lake water is known for its therapeutic and healing properties due to its high concentration of minerals such as iodine and magnesium.Lake Vouliagmeni is also surrounded by a beautiful green area with gardens, walking paths, and picnic areas. There are also beach bars and restaurants where you can enjoy typical Greek cuisine while enjoying the sea view.In addition, Lake Vouliagmeni also offers various activities such as underwater swimming and fishing. You can also rent a pedal boat or take a boat ride to explore the lake.In summary, Lake Vouliagmeni is an ideal tourist destination for those seeking relaxation, swimming and wellness. With its thermal waters, its beautiful location, and the many activities it offers, the lake is a must-visit place to visit during a vacation in Greece.