For a mere $800,000 or so you can turn your swimming pool into a games room, dance floor or basketball court at the touch of a button. It's all done by adding a moving floor to your swimming pool. 

Just an ordinary millionaire's swimming pool. But at the press of a button it become this...

The whole process takes about 15 minutes for the floor to rise up out of the water.

Pool owners can enjoy their pools, then turn the room into a play space with a solid floor.

The pool floor can be moved to different heights so children can play safely.

Owners have been installing these floors in Britain, Europe and USA.

This computer generated graphic shows how it works.

Katie Sullivan, a spokeswoman for Guncast, the British firm that manufactures them said: "They are particularly sought after in cities, like London, where space is at a real premium. But we have also fitted them in country mansions."

Source: Daily Mail