Cuban President Raul Castro gives a speech, on January 27, 2014, during the inauguration of first stage of the Mariel port and special development zone, in Mariel, Artemisa province, Cuba. - 

Cuba is trying to lure foreign investment with a multi-million dollar shipping port. The $957 million overhaul of the port of Mariel, in west Havana, is being financed by Brazil, and is in the heart of a special economic development zone. The BBC's Sarah Rainsford in Cuba says the upgrade of the port is the biggest project there for many years. Click the audio player above to hear her story.