World’s first 360° infinity pool will sit atop a 55-story building in London

London may soon be adding another impressive architectural work to its skyline, and this time it’s the rooftop pool that takes center stage.

Set upon a 55 storey building, the world’s first 360-degree rooftop infinity pool is not for the faint of heart. It will be located on top of a new five-star hotel called the Infinity London, according to Compass Pools.

The rooftop pool will hold 600,000 litres of water and will be made from cast acrylic and will feature transparent sides and floors, so visitors below will be able to see swimmers splashing around above them.

Image via Compass Pools’ website

Compass Pools’ website says that swimmers would use a spiral staircase “based on the door of a submarine” that rises from the pool’s floor. Alex Kemsley, a pool designer and technical director for Compass Pools, told INSIDER that the staircase would work like “a tube in a tube.”

“The first tube is to ‘cut a path’ through the water and create an airlock,” Kemsley said. “The second to deliver the staircase up to water level.”

The company opted not to add stairs to the outside of the building or the pool because it would spoil the view.

Image via Compass Pools’ website

Kemsley added that the staircase would be controlled by a programmable logic controller to ensure that all locks and valves operate at the correct time.

But that didn’t stop on-lookers from speculating how swimmers would get in and out of the pool. Care to guess?

The construction of Infinity London could begin as soon as 2020. The exact location is yet to be confirmed.