8. 3 0PM, ONE Singapore’s Marina Bay Sands isn’t only one of the most striking landmarks of recent times it is also one of the most complex. Engineers had to construct three 57-storey skyscrapers and add a 340m sky park as big as an aircraft carrier on top. The hotel towers are designed at sleek angles that could see them buckle under their own weight. The cost is around $7 billion. A fascinating episode.