About 8 km of Zlatograd city is located the church - monastery fortress "St. Nedelya". The protected area covers 25.6 hectares. The most common tree species are - beech, hornbeam, oak, black and white pine, sumac etc. There are single ancient trees - oak, hornbeam, sweet chestnut, black and white pine. In the area Balalitska River is located the oldest domesticated chestnut over 278 years old.