Things to do in Glyfada/Vouliagmeni
The shores south of Athens are known as the Athenian Riviera, with beaches spanning roughly 25 miles. One of the nicest of these belongs to the Astir Palace resort, on its private peninsula south of Athens.
Natural hot springs continually fill this saltwater/mineral-water lake from below, keeping the brilliantly blue waters at a temperature of around 75 degrees year-round. A hydrotherapy center ($12 entry fee) offers treatments, and underground caves attract the occasional diver.