On a budget, Lake Vouliagmeni still earns its price.
~€12–15 entry; loungers extra
Swimming in the mineral-rich, 22–29°C lake under sheer rock walls is a genuinely unusual, restorative experience — and the little fish nibbling your feet are a free pedicure. The catch: it's a managed pay-entry facility (~€12+) with sunbeds, it gets busy in summer, and it's well out of the centre on the southern coast.