This spiral staircase of Eestairs is a very smart space saving solution. He fits in just one square meter. The secret is that you hit the bottom on the pole, and on top you step up the same pole. It is made of carbon steel, powder coated in any RAL color.
The Grand Staircase at the, Musée National Gustave Moreau, Paris
These multiuse stairs are great for displaying objects and fitting in extra storage, but we're not so sure about the lack of a banister and the gaping space between the top and bottom section. ArchiExpo.com - HouseBeautiful.com