![Sliven Sliven](https://culturaltourism.info/wp-content/uploads/2023/03/sliven.png)
The city of Blue stones National park, the cradle of the Bulgarian textile industry and the spiritual center of the Bulgarian revival! Welcome to Sliven – known and unknown!
The city of Blue stones National park, the cradle of the Bulgarian textile industry and the spiritual center of the Bulgarian revival! Welcome to Sliven – known and unknown!