Macau's landscape shows the far reach of human ambition - land reclamations have joined up the two islands of Coloane and Taipa to make a gambling and shopping sprawl called the Cotai Strip. Flashy casinos and garish hotels tower over what was once a sleepy trading town at the mouth of south China's Pearl River Delta. But now some of those towers stand half-finished, the sound of building work has gone. Only dust and concrete remain.