Lake Vouliagmeni, nestled in the heart of the Athenian Riviera, is a hidden gem of Attica's natural beauty. Situated amidst an idyllic landscape, this extraordinary geological wonder awaits discovery. The lake's brackish waters, continually replenished by both the sea and subterranean thermal springs, provide a truly unique and natural thermal spa experience. Lake Vouliagmeni stands out as a top attraction in Athens, thanks to its exceptional attributes. Firstly, its prime location is a considerable advantage. Additionally, the lake enjoys a delightful climate, with water temperatures ranging from 22°C to 29°C throughout the year. The therapeutic properties of the lake's waters are renowned for their healing benefits.

This pebbled beach is one of the best beaches along the coast of Attica and a popular day trip from Athens. It's accessible with a small day entry fee, which includes rental for the sunbeds and umbrellas, and access to facilities like the tennis and volleyball courts. There are restaurants, cafes, and bars to explore too. It gets busy on weekends, especially during summer, so get there early if you want to snag your choice of sunbed. Winter is also a great time to see surfers in action. You can visit the beach on a sailing cruise from Athens, which sometimes also includes snorkeling and amazing sunset views from the boat. – Tripadvisor