Hissarya

Hisarya (also spelled Hisar or Hissarya) is a small resort town in Bulgaria, in Plovdiv Province.
Located in the outskirts of the Sredna Gora mountain range, it boasts of a very mild climate and over two dozen different mineral springs, which make it a favorite spa for many Bulgarian and foreign tourists.
Because of these springs, the town was founded thousands of years ago. Some pre-historic remains have been found in what is now the town centre. Later, it became a Thracian city, and when Thrace fell to the Romans and became a Roman province, Hisarya became a Roman town - one of the three most important towns in the province. At various times it was called Augusta, Diocletianopolis (after emperor Diocletian) and a couple of other names. It was a famous resort even in those times, which is proved by the fact that emperor Septimius Severus himself visited the city.
http://en.wikipedia.org/wiki/Hissarya%2C_Bulgaria