Egerszalók is an open-air spa and village (population 2,311) located in Heves County in northeastern Hungary. The springs yield 68°C. mineral water from an aquifer located under the volcanic Mátra Mountains. The spa is located 8 km west of the county seat of Eger, from which it is served by motorbus. Egerszalok lies 133 km from Budapest, in the Lasko stream valley between the Matra and Bukk ranges. The village can be easily reached from the M3 highway.
The historical and geographical associations of Egerszalók have made it a favourite spa in Hungary. The area's waters have been in use since the 1730s, although the current spa only came into operation in 1961.
Surrounding the springs are pine trees, apple trees, and a grove of the beeches for which the nearby Bükk Mountains are known. The region grows Egri Bikavér wine, sometimes called bull's blood wine in English, and spa visitors sometimes enjoy the terroir experience by bathing in the spa and drinking the wine.