A view of the infinity pool at Skypark on the roof of the Marina Bay Sands Hotel overlooking the Singapore skyline. The SkyPark, 200m above ground level, is larger than three football pitches and has an observation deck, 250 trees and a 150m infinity swimming pool. With a growing urban population, high-rise buildings are an increasingly prevalent feature cities across the world. Land is a major constraint in most Asian cities and in the face of high-density urbanisation, the only way to build is upwards. In the dense, urban environment of Singapore, where land area is severely limited, high-rise buildings have typified the urban fabric for years.