Jay Walker's library

Walker's house was constructed specifically to accommodate his massive library. To create the space, which was constructed in 2002, Walker and architect Mark Finlay first built a 7-foot-long model. Then they used miniature cameras to help visualize what it would be like to move around inside. In a conscious nod to M. C. Escher (whose graphics are echoed in the wood tiling), the labyrinthine platforms seem to float in space, an illusion amplified by the glass-paneled bridges connecting the platforms. Walker commissioned decorative etched glass, dynamic lighting, and even a custom soundtrack that sets the tone for the cerebral adventures hidden in this cabinet of curiosities. "I said to the architect, 'Think of it as a theater, from a lighting and engineering standpoint,'" Walker says. "But it's not a performance space. It's an engagement space."

 Via Wired