Those two amazing sets of stairs are from the Didden Village project by Dutch architectural firm MVRDV. The project itself is a rooftop addition in Rotterdam, Netherlands. The exterior is a stark contrast to its surrounding (and may not be to everyone's tastes), as you can see in the link below, but the interior stairs are amazing!
Tokyoflash Treasure Hunt - Win a Tokyoflash Watch of Your Choice!
Going on right now: Tokyoflash Treasure Hunt #26. Win a Tokyoflash watch and neat stuff from the NeatoShop. It's fun and easy to play: Link