The province of Palawan, an archipelago in itself, stretches southwest of Luzon almost as far as Borneo, forming one of the four sides of the Sulu Sea. It consists of a principal island, Palawan, and more than seventeen hundred minor islands. Its capital and only city is Puerto Princesa. A surviving fortress church in Cuyo with cannon on its four towers bears witness that Palawan was a regular route of the Moro pirates. The province's ethnography is extremely complex. The population is some 737,000 on 16,456 sq.km. Its wildlife is remarkably diverse, including many species not found elsewhere. The government encourages eco-tourism to prevent habitat destruction, and there are a number of national parks and wildlife refuges. Palawan produces maize, rice, coconuts, cashews, natural gas and oil, and huge amounts of fish. Livestock raising, seaweed farming, and food processing are being developed.