Wikipedia
Provadia
Provadia is a town in northeastern Bulgaria, part of Varna Province, located in a deep karst gorge (Provadia syncline) along the Provadia River not far from the Bulgarian Black Sea Coast. It is the administrative centre of Provadia Municipality. As of December 2009, the town has a population of 12,901 inhabitants.
Provadia served as a customs point since ancient times. It is well known for salty mineral waters, its mild climate and a total of 70 km of caves in the surrounding mountain walls. It can be reached by train from Sofia or Varna and there are also hourly buses from and to Varna, and a sophisticated road system.