With its vibrant diversity of attractions and facilities and the ground-breaking design that creates maximum visual impact, Singapore's Marina Bay Sands development is bound to become a timeless landmark. Seldom before have so many challenges been encountered by engineers and builders. As the complex involves hotel towers, a museum, casino, waterfront promenade, theatres and a skypark - all being worked on simultaneously, it is one of the largest and most complex construction sites that engineers ever had to deal with.