Stair treads, detail from a 2004 house in Japan by Tomoaki Uno, from the architect's website.

Escalier acier sur béton - Steel staircase in a house by Nagoya-based Japanese architect Tomoaki Uno

Modern Weekend House- Pilar House by Vanguarda Architects

It’s a time-honored Bauhaus principle that Vanguarda Architects used to create a unique geometric space for easy weekend living in Pilar, Argentina.