On the territory of Sliven District are located: natural park "Sinite kamani", the reserve "Orlitza", the tended reserves "Ardachlaka" and "Sini bryag", the natural phenomena - "Halkata"/The loop/, "Bachvata"/ The Cask/ and "Urushki skali", the caves " Ledenika", "Orlovi dupki", "Zmeevi dupki", "Dolnata maaza" and "Prikaznata". The most popular wineries of the region are: Sliven, Nova Zagora, Shivachevo, Padarevo and Korten. In this category: The town of SlivenThe town of Sliven is the district centre with a population of 97 500 inhabitants. It is situated at a distance of 276 km from Sofia at the southern foot of the eastern part of the Stara Planina Mountains ...  The town of Nova Zagora The town of Nova Zagora has a population of 24 000 inhabitants and lies at a distance of 38 km southeast of Sliven. The town is a municipal centre with 33 component settlements. In the vicinity of the ...  The town of KotelThe town of Kotel has a population of 6 800 inhabitants and lies at a distance of 72 km northeast of Sliven. It is located at a small picturesque valley in the eastern part of the Stara Planina Mountains ...  The town of TvarditzaThe town of Tvarditza has a population of 6 000 inhabitants and lies at a distance of 46 km northwest of Sliven. Tvarditza is a municipal centre with 9 component settlements. The Balkan coal pool, occupying ...  The town of Shivachevo The town of Shivachevo lies at a distance of 11 km from the town of Tvarditza. It has a population of 4 000 inhabitants. In the vicinity of the town have been discovered the remains of a late-ancient-times ...  The town of KermenThe town of Kermen has a population of 2 000 inhabitants and lies at a distance of 25 km southeast of the district town. In the vicinity of the town have been discovered a prehistoric settlement mound, ... 
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