From the Observation Deck, I looked down on Dubai below. What struck me was how this is a city carved into the sand. Its buildings, houses, shopping malls, mosques, roadworks and waterways are all surrounded by the ubiquitous off-white colour of the sand. It stretches to the horizon and beyond. they say the haze you see from that lofty height is not smog, but sand. It was the highest I'd ever been in a building. The World Trade Centre in New York had only 110 floors. The tip of the Burj Khalifa can be seen 95 kilometres away....perhaps assuming there is no haze.