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Despite the sky pool’s daredevil appearance, Ballymore says the pool has been granted planning permission and, like its renderings, will be entirely transparent and structure-free. The pool was designed by engineering firm Arup Associates with specialist advice from marine design engineers Eckersley O’ Callaghan and aquarium designers Reynolds. The amazing structure will be developed as part of the HAL-designed 2,000-home Embassy Gardens in the new Nine Elms quarter that’s currently under construction.

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The swimming pool will allow residents to swim between the two luxury apartment buildings, which are both topped by sky decks with a bar, spa, orangery, and dramatic views of the Palace of Westminster. Residents who prefer not to swim can also get across via a footbridge. The proposed structure is 82 feet long, 16.4 feet wide, and nearly 10 feet deep, and was modeled after an aquarium.

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Related: Crazy home carved into a coastal cliff has a swimming pool roof

“My vision for the sky pool stemmed from a desire to push the boundaries in the capability of construction and engineering, I wanted to do something that had never been done before,” said Ballymore’s chairman and CEO, Sean Mulryan. “The experience of the pool will be truly unique, it will feel like floating through the air in central London.”

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Sadly, not everyone will have the opportunity to swim through the air—units in the Embassy Gardens cost upwards of £602,000 (USD$944,000). The Embassy Gardens development is slated for completion in 2017.

+ Ballymore

+ Arup Associates