The Blue Stones Natural Park above the town of Sliven, Southeast Bulgaria enjoys the interest of Belgian and German tourists, who are not organized in advance by a tour operator. Local people are happy with the fact and notice that most of the guests travel around the area with their families in campers. Their favorite routes are the Karandila locality, Sunny Meadow and Flat River areas. The Halkata rock phenomenon also attracts huge interest. The cableway is another advantage. Griffon vultures, now an endangered species, can be seen at the Karakyutuk area.