Don’t look down: A guest swims in the infinity pool of the Skypark that tops the Marina Bay Sands hotel towers – 55 stories over the city of Singapore .
The pool stretches 150 meters, three times the length of an Olympic swimming pool .
At three times the length of an Olympic pool and 650ft up, it is the largest outdoor pool in the world at that height.It features in the impressive, boat-shaped ‘SkyPark’ perched atop the three towers that make up the world’s most expensive hotel, the 4billion Marina Bay Sands development in Singapore .