aerial scenic view of thrace plane sredna gora and balkan mountains bulgaria

aerial air aircraft airline airplane land earth atmosphere attraction attractive balkan balkans blue bulgaria climate coast destination discover discovery europe european flight fly flying holiday holidays horizon industry jet journey aviation airborn mountains overview panorama passenger range perspective plane flights prospect scene scenery scenic sofia space tourism tourist tourists transport transportation travel trip vacation vacations vast view sredna gora mountain aircarrier distant excursion trakia highway green ground terrain peaks summit passage pass thoroughfare road motorway upper thracian lowland thrace