The travertines are formed by calcium-rich water bubbling up at 35°C from springs above the cliff and cascading down a 200-metre slope, depositing limestone as it cools. The result is dozens of shallow, scallop-edged pools in a brilliant white that turns blue with the water inside — instantly recognisable from a hundred Turkish tourism posters.
Visitors walk the slope on a single designated barefoot path; you carry your shoes in your hand. The water is warm in winter and chilled-feeling in summer. Bring a swimsuit — the pools at the upper levels are deep enough to bathe in. Sunset turns the white travertines pink and is the most photographed hour of the day; sunrise has fewer crowds.