National road #6 begins from the Macedonian border - Kiustendil - Pernik - Sofia - Pyrdop - Karlovo - Kazanluk - Sliven - Karnobat - Burgas. The pictures shown are from the stretch between the village of Bunovo and the town of Pirdop. To see the map, please click the link -->[ https://pbase.com/ngruev/image/75188843