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The Cells - an amazing spiral staircase located in a home in Le Havre, France (via Homes With Amazing Staircases - Yahoo! Real Estate)

Vertebrae Staircase by Andrew McConnell (Canadian architect). Concept is based on a whale's backbone. "Each piece would incorporate one step, one banister and part of the hand rail, interlocking to create a rigid, self-supporting structure." (Dezeen)

Mail Onlinefrom Mail Online

Now that's what you call a conversion! Former church transformed into £50m home with gym and pool is a temple to modern design

♂ Luxury home interior A lift shaft made of bronze and glass runs through all four storeys of the home, hidden inside the spiral staircase

A modern wooden staircase in a renovation of a historical apartment by Porto, Portugal, firm Ezzo. Photo by Alexandre Delmar. Pequena escada muito bem resolvida.

KNSTRCTfrom KNSTRCT

A Well-Curated Home: Isay Weinfeld Designs Casa Cubo

Beautiful staircase

Origami Stair by Bell Phillips is made of folded 6mm stainless steel and framed with a glass balustrade.

Curblyfrom Curbly

10 Architecturally Wondrous Staircases

Cool - but not sure I'd feel safe stumbling down this in the morning before a cup of coffee!