Bulgaria also boasts a solid infrastructure of highways and main, first-class roads which facilitate fast movement of goods and services, domestically and to and from Europe and Asia. Five Pan-European corridors go through the country, providing easy access to regional and European markets. Two of the largest seaports in Bulgaria are located in Varna and Bourgas, constituting part of the Pan-European Corridor VIII, connecting the Adriatic Sea, the Black Sea, the Middle East, and Asia.
The Danube River is also a key water connection with Western Europe, comprising several Bulgarian riverports at Ruse, Vidin, and Lom. The four international airports—in Sofia, Plovdiv, Varna, and Bourgas—are important threads of Bulgaria’s infrastructure network and facilitate the rapid transportation of cargo, as well as the flow of tourism and business to and from Bulgaria. The country’s railway infrastructure is constantly being expanded and renovated in order to meet the highest European requirements concerning the movement of goods and services.