This concrete staircase into the air by Lisbon architecture studio Ateliermob functions as a riverside amphitheatre on the banks of the Tagus in central Portugal (+ slideshow). More »
This half-scale model of a spiral staircase by American studio Matter Design is made from concrete treads that slip neatly over each other. More »
Italian studio Disguincio & Co has produced a concept for a spiral staircase with steps made from folds of fibreglass. More »
Mysterious flights of stairs float in mid-air or form elevated outdoor walkways in this series of installations by artists Lang/Baumann (+ slideshow). More »
Chinese studio Archi-Union has converted an office block in Shanghai into an art gallery with a concrete staircase twisting through its middle (+ slideshow). More »
Walls of books fold around a wooden staircase in this renovation and extension to a north London home by Hackney studio Platform 5 Architects. More »
This staircase concept by Canadian architect Andrew McConnell is based on a whale's backbone (+ slideshow). More »
Following the popularity of the staircase that doubled as bookshelf we featured this week (bottom left), we’ve put together a new Pinterest board filled with all the staircases published on Dezeen so far. Almost 24,000 people now follow us on Pinterest – join them here.