Kochi, with a population of 600,000 is celebrated as the "Queen of the Arabian Sea". This sea port at the centre of the Malabar coast grew rich through the export of spices to Europe via the Arabian Sea. The natural harbour of Cochin was created only in the 14th Century as a result of flooding of the lagoon coastline. Expansion work began in 1929. One of the must-sees is the Kathakali dance-drama performed by the natives. Other sights include: "Mattancherry", the Dutch Palace, the synagogue, "Fort Kochi", St. Francis' Church, the Santa Cruz Basilica, the Dutch cemetery, the Chinese fishing nets, Willingdon Island and the Hill Palace Museum.