The geyser of Herľany is located in the village of Herľany on the western slopes of the Slanské Hills within the complex of the former Herľany-Rankovce spa. It is an man-made cold geyser which sprang into action after the drilling of a new well that aimed to increase the yield of the mineral springs in the former spa. Unlike hot-water geysers, the temperature of the geyser of Herľany ranges between 14 and 18 °C. Drilling activities began in 1870. The first eruption, four to five metre high, took place in 1872 at a drill hole depth of 172 metres. The next...