Burgas or Bourgas is the second-largest city on the Bulgarian Black Sea Coast and the fourth-largest in Bulgaria after Sofia, Plovdiv and Varna. It is the capital of Burgas Province and an important industrial, transport, cultural and tourist centre. The city is surrounded by the Burgas Lakes and located at the westernmost point of the Black Sea, at the large Burgas Bay. The LUKOIL Neftochim Burgas is the largest oil refinery in south-eastern Europe and the largest industrial enterprise. The Port of Burgas is the largest port in Bulgaria, and Burgas Airport is the second-most important in the country. Burgas is the centre of the Bulgarian fishing and fish processing industry.