Image by Marissa Tejada Lonely Planet

This lightly salty lake, at the base of a huge cliff, is connected to the sea underground and fed by mineral-rich warm springs, so its temperature never falls below 21°C. This makes it a friendly habitat for fish that nibble the dead skin from your feet – an exfoliating treat for some, or a nightmare for the ticklish.

The loyal clientele of bathing-cap-clad elderly citizens tout the water's healing properties. There's a modern spa-cuisine cafe (lunch from €12) at the edge, where you can eat without paying the lake admission, plus sunbeds, a playground and showers. Take the A2 bus (E2 express in summer) to Plateia Glyfada (aka Plateia Katraki Vasos), then take bus 114, 115 or 149.