(Photo: Koji Fujii)
The Ribbon Chapel is a wedding chapel in Onomichi, Hiroshima, Japan. Hiroshi Nakamura of NAP Architects designed it. The structure is contained within two separate staircases that intertwine as they ascend until they meet at the top. It's a great symbol of marriage that provides practical solutions for human movement during complex and well-attended weddings. The opaque staircases also provide shade from the sun that shines in through the full-length windows. You can see more photos of it at Design Milk.
-via Lawrence E. Forbes