The salt hill at Egerszalók is one of Hungary's most striking natural formations: thermal water at 68°C rises from deep underground and cascades down a hillside, depositing white calcium carbonate (travertine) terraces as it cools. The result is an otherworldly landscape of white-crusted ledges and mineral pools that strongly resembles the famous terraces of Pamukkale in Turkey — though Egerszalók's formation is entirely accidental, triggered by a 1961 oil exploration drill.
The terraces are visible from outside the Saliris Resort property, but to get close you need to be using the spa complex. The thermal water is rich in calcium, magnesium, and bicarbonate, and the pools range from pleasantly warm to genuinely hot depending on the section. The hill continues to grow as the water deposits new layers of mineral crust — a geological process you can watch in real time. The contrast between the white terraces and the green Hungarian hills around them is particularly striking in good weather. The site is about ten kilometres from Eger and easily combined with a visit to the city's wine country.