Lake Vouliagmeni

The lake sits where a thermal cave roof collapsed long ago, leaving a half-bowl of raw limestone cliff around water that stays warm enough to swim in every month of the year. The colour is a milky teal that photographs richer than it looks to the eye, and the cliff face behind it gives frames a texture nothing else on the Riviera has.

Late afternoon is the window: the sun drops low enough to warm the cliff, the water goes glassy as the day crowd thins, and the resident swimmers — many of them regulars of decades — carry on regardless, which is part of the charm. Winter mornings add steam rising off the surface, the most atmospheric version of the place and the least known.

Be clear about what it is: a managed spa facility with an entry fee, sunbeds and opening hours, not a wild swimming hole. A couple being photographed quietly passes without comment; anything that reads as a production — lighting stands, changes of outfit, a drone — needs arranging with the management first. Ask before promising, and the shoot stays welcome.