Object Élevé by Studio Mieke Meijer photograph courtesy of MiekeMeijer.nl

Spotted on Dezeen, this extremely cool staircase / cabinet / workstation by Dutch Designstudio Mieke Meijer (Mieke Meijer + Roy Letterlé) for a private residence in Wassenaar, the Netherlands (near The Hague).

Object Élevé by Studio Mieke Meijer photograph courtesy of MiekeMeijer.nl

I'm not sure whether it is in fact the most convenient staircase, but it certainly is well-designed.

Object Élevé by Studio Mieke Meijer photograph courtesy of MiekeMeijer.nl

More about this project can be found on Dezeen and on Studio Mieke Meijers' website.