But swimming to the edge won't be quite as risky as it looks. While the water in the infinity pool seems to end in a sheer drop, it actually spills into a catchment area where it is pumped back into the main 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.
Don't look down: A guest swims in the infinity pool of the Skypark that tops the Marina Bay Sands hotel towers - 55 storeys over the city of Singapore yesterday
To infinity... and beyond! The pool stretches 150 metres, three times the length of an Olympic swimming pool 
The view over the side: An artist's impression shows the Skypark that tops the Marina Bay Sands hotel towers, including the infinity poolThe hotel, which has 2,560 rooms costing from £350 a night, was officially opened yesterday with a concert by Diana Ross.
The Emirates Palace Hotel in Abu Dhabi, estimated to have cost £2billion when it opened in 2004, was previously the world's most expensive hotel.
But with its indoor canal, opulent art, casino, outdoor plaza, convention centre, theatre, crystal pavilion and museum shaped like a lotus flower, the Marina Bay Sands has taken its crown.
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Infinity pools give the effect that the water extends to the horizon. In reality, the water spills over the edge into a catchment below, and is then pumped back into the pool. The pools have two circulation systems. The first functions like that of a regular pool, filtering and heating the water in the main pool. The second filters the water in the catch basin and returns it to the upper pool.
The resort from across the bay. The three towers were based on a deck of cards, according to designer Moshe Safdie
A skydiver parachutes pass the Singapore Flyer and Marina Bay Sands casino resort as part of the venue's opening celebrations yesterday
Extreme: Left, relay teams scale one of the towers in a race commemorating the opening yesterday. Right, a newly-wed couple enjoy a canal ride inside the resort's shopping centreThe Marina Sands resort was designed by architect Moshe Safdie who based it on a deck of cards.
Inside shoppers can ride along an indoor canal in Sampan boats styled on traditional Chinese vessels from the 17th century.
The owners have also commissioned five well-known artists to create works of art to 'integrate' with the buildings. Among these is a 40m-long Antony Gormley sculpture made from 16,100 steel rods. The whole thing weighs 14.8 tons and it took 60 people to assemble it in the hotel.
Artist Chongbin Zheng created Rising Forest which is 83 three metre high pots with trees in them. The pots were so big the artist had to build a customised kiln the size of a small building to make them in.
Last night, the world's most expensive hotel was given a launch party befitting it. Singing legend Diana Ross performed for 2,500 VIPs in the resort's Grand Ballroom and pop singer Kelly Rowland headlined an outdoor concert.
Money-maker: Left, the entrance to the casino, which costs nearly £50 to get in and is attracting 25,000 visitors each day. Right, a man looks through a steel web art structure in one of the towersRead more: http://www.dailymail...l#ixzz1TCq9hT3i
