The ghost tow ns of China, Ireland and Spain - full of large empty house estates - may be a phenomenon that is on its w ay to Africa. Built for people w ho never move in, they leave those w ho did w ith a w orthless property they cannot sell. Perched in an isolated spot some 30km (18 miles) outside Angola's capital, Luanda, Nova Cidade de Kilamba is a brand-new mixed residential development of 750 eight-storey apartment buildings, a dozen schools and more than 100 retail units. Designed to house up to half a million people w hen complete, Kilamba has been built by the state- ow ned China International Trust and Investment Corporation (CITIC) in under three years at a reported cost of $3.5bn (£2.2bn). Spanning 5,000 hectares (12,355 acres), the development is the largest of several new "satellite cities" being constructed by Chinese firms around Angola, and it is believed to be one of the largest new -build projects on the continent.